A rock is thrown from the edge of the top of a 100-ft tall building at some unknown angle above the horizontal. The rock strikes the ground a horizontal distance of 160 ft from the base of the building 5.0 s after being thrown. Assume that the ground is level and that the side of the building is vertical. Determine the speed with which the rock was thrown.

A rock is thrown from the edge of the top of a 100-ft tall building at some unknown angle above the horizontal. The rock strikes the ground a horizontal distance of 160 ft from the base of the building 5.0 s after being thrown. Assume that the ground is level and that the side of the building is vertical. Determine the speed with which the rock was thrown.

1) 72 ft/s
2) 77 ft/s
3) 68 ft/s
4) 82 ft/s
5) 87 ft/s





Answer: 3

A car travels in a flat circle of radius R. At a certain instant the velocity of the car is 24 m/s west, and the acceleration of the car has components of 2.4 m/s2 east and 1.8 m/s2 south. What is the radius of the circle?

A car travels in a flat circle of radius R. At a certain instant the velocity of the car is 24 m/s west, and the acceleration of the car has components of 2.4 m/s2 east and 1.8 m/s2 south. What is the radius of the circle?

1) 0.24 km
2) 0.19 km
3) 0.32 km
4) 0.14 km
5) 0.27 km






Answer: 3

Newton approximated motion in a circle as a series of linear motions, as in the polygon below. HEXAGON If we assume the particle moves at constant speed vA from A to B, and at constant speed vB from B to C, the direction of the acceleration, , at point B, is shown by the arrow in

Newton approximated motion in a circle as a series of linear motions, as in the polygon below.
HEXAGON
If we assume the particle moves at constant speed vA from A to B, and at constant speed vB from B to C, the direction of the acceleration, , at point B, is shown by the arrow in

1) left
2) diagonal right down
3) diagonal left down
4) diagonal left up
5) diagonal right up

Answer: 3

Two cooks standing side by side in a restaurant pull their beaters out of the dough at the same instant. A glob of dough flies off each beater. Each glob lands on the top of a tin the same horizontal distance away and at its initial height. However, one lands later than the other. The explanation is that they left the beaters at angles q1 and q2 such that:

Two cooks standing side by side in a restaurant pull their beaters out of the dough at the same instant. A glob of dough flies off each beater. Each glob lands on the top of a tin the same horizontal distance away and at its initial height. However, one lands later than the other. The explanation is that they left the beaters at angles q1 and q2 such that:

1) q2 = -q1.
2) q1 + q2 = pi/4
3) q1 + q2 = pi/2.
4) q1 + q2 = p.
5) q1 - q2 = p.








Answer: 3

A particle moves at a constant speed in a circular path with a radius of 2.06 cm. If the particle makes four revolutions each second, what is the magnitude of its acceleration?

A particle moves at a constant speed in a circular path with a radius of 2.06 cm. If the particle makes four revolutions each second, what is the magnitude of its acceleration?

1) 20 m/s2
2) 18 m/s2
3) 13 m/s2
4) 15 m/s2
5) 24 m/s2








Answer: 3

A stunt pilot performs a circular dive of radius 800 m. At the bottom of the dive (point B in the figure) the pilot has a speed of 200 m/s which at that instant is increasing at a rate of 20 m/s2. What acceleration does the pilot have at point B? HALF CIRCLE GRAPH

A stunt pilot performs a circular dive of radius 800 m. At the bottom of the dive (point B in the figure) the pilot has a speed of 200 m/s which at that instant is increasing at a rate of 20 m/s2. What acceleration does the pilot have at point B?
HALF CIRCLE GRAPH

1) (50i + 20j) m/s2
2) (20i - 50j) m/s2
3) (20i + 50j) m/s2
4) (-20i + 50j) m/s2
5) (-50i + 20j) m/s2








Answer: 3

The site from which an airplane takes off is the origin. The x-axis points east; the y-axis points straight up. The position and velocity vectors of the plane at a later time are given by x=(1.61x10^4i+9.00x10^3j)m and v=(150i-21j)m/s The magnitude, in meters, of the plane's displacement from the origin is

The site from which an airplane takes off is the origin. The x-axis points east; the y-axis points straight up. The position and velocity vectors of the plane at a later time are given by
x=(1.61x10^4i+9.00x10^3j)m and v=(150i-21j)m/s
The magnitude, in meters, of the plane's displacement from the origin is

1) 9.14 ´ 103.
2) 1.61 ´ 104.
3) 1.84 ´ 104.
4) 9.14 ´ 103t.
5) 1.61 ´ 104t.







Answer: 3

In a location where the train tracks run parallel to a road, a high speed train traveling at 60 m/s passes a car traveling at 30 m/s. How long does it take for the train to be 180 m ahead of the car?

In a location where the train tracks run parallel to a road, a high speed train traveling at 60 m/s passes a car traveling at 30 m/s. How long does it take for the train to be 180 m ahead of the car?

1) 2.0 s
2) 3.0 s
3) 6.0 s
4) 9.0 s
5) 18.0 s









Answer: 3

A 0.14-km wide river flows with a uniform speed of 4.0 m/s toward the east. It takes 20 s for a boat to cross the river to a point directly north of its departure point on the south bank. What is the speed of the boat relative to the water?

A 0.14-km wide river flows with a uniform speed of 4.0 m/s toward the east. It takes 20 s for a boat to cross the river to a point directly north of its departure point on the south bank. What is the speed of the boat relative to the water?

1) 5.7 m/s
2) 8.5 m/s
3) 8.1 m/s
4) 7.0 m/s
5) 6.4 m/s









Answer: 3

A carnival Ferris wheel has a 15-m radius and completes five turns about its horizontal axis every minute. What is the acceleration of a passenger at his lowest point during the ride?

A carnival Ferris wheel has a 15-m radius and completes five turns about its horizontal axis every minute. What is the acceleration of a passenger at his lowest point during the ride?

1) 5.7 m/s2 downward
2) 4.1 m/s2 upward
3) 14 m/s2 downward
4) 4.1 m/s2 downward
5) 19 m/s2 downward









Answer: 2

Car A leaves point O at t = 0 and travels a quarter circle counterclockwise at 30.0 m/s to point P. Car B will leave point O and travel to point P at the same speed but in a straight line. The radius of the circle is 100 m. At what time should car B leave point O in order to arrive at point P at the same time as car A?

Car A leaves point O at t = 0 and travels a quarter circle counterclockwise at 30.0 m/s to point P. Car B will leave point O and travel to point P at the same speed but in a straight line. The radius of the circle is 100 m. At what time should car B leave point O in order to arrive at point P at the same time as car A?

1) At t = 0.
2) At t = 0.53 s.
3) At t = 4.71 s.
4) At t = 4.98 s.
5) At t = 5.24 s.








Answer: 2

A car travels in a flat circle of radius R. At a certain instant the velocity of the car is 20 m/s north, and the total acceleration of the car is 2.5 m/s2 37° south of west. Which of the following is correct?

A car travels in a flat circle of radius R. At a certain instant the velocity of the car is 20 m/s north, and the total acceleration of the car is 2.5 m/s2 37° south of west. Which of the following is correct?

1) R = 0.40 km, and the car's speed is decreasing.
2) R = 0.20 km, and the car's speed is decreasing.
3) R = 0.20 km, and the car's speed is increasing.
4) R = 0.16 km, and the car's speed is increasing.
5) R = 0.16 km, and the car's speed is decreasing.

Answer: 2

Given the equations below, which description best fits the physical situation? -99.6m=(-40.0m/s)(2.00s) - 1/2(9.80m/s2)(2.00s)2

Given the equations below, which description best fits the physical situation?
-99.6m=(-40.0m/s)(2.00s) - 1/2(9.80m/s2)(2.00s)2 

1) A projectile's displacement two seconds after being fired downward with a speed of 30.0 m/s.
2) A projectile's displacement two seconds after being fired downward with a speed of 40.0 m/s.
3) A projectile's displacement two seconds after being fired downward with a speed of 50.0 m/s.
4) A projectile's displacement two seconds after being fired downward with a speed of 60.0 m/s.
5) A projectile's displacement two seconds after being fired downward with a speed of 80.0 m/s.

Answer: 2

A ball is thrown horizontally from the top of a building 0.10 km high. The ball strikes the ground at a point 65 m horizontally away from and below the point of release. What is the speed of the ball just before it strikes the ground?

A ball is thrown horizontally from the top of a building 0.10 km high. The ball strikes the ground at a point 65 m horizontally away from and below the point of release. What is the speed of the ball just before it strikes the ground?

1) 43 m/s
2) 47 m/s
3) 39 m/s
4) 36 m/s
5) 14 m/s









Answer: 2

A car travels in a due northerly direction at a speed of 55 km/h. The traces of rain on the side windows of the car make an angle of 60 degrees with respect to the horizontal. If the rain is falling vertically with respect to the earth, what is the speed of the rain with respect to the earth?

A car travels in a due northerly direction at a speed of 55 km/h. The traces of rain on the side windows of the car make an angle of 60 degrees with respect to the horizontal. If the rain is falling vertically with respect to the earth, what is the speed of the rain with respect to the earth?

1) 48 km/h
2) 95 km/h
3) 58 km/h
4) 32 km/h
5) 80 km/h








Answer: 2

Instructions: On occasion, the notation = [A, q] will be a shorthand notation for . If and , what is the direction of the vector ?

Instructions: On occasion, the notation = [A, q] will be a shorthand notation for .
If and , what is the direction of the vector ?

1) -49°
2) -41°
3) -90°
4) +49°
5) +21°









Answer: 2

A projectile is thrown from the top of a building with an initial velocity of 30 m/s in the horizontal direction. If the top of the building is 30 m above the ground, how fast will the projectile be moving just before it strikes the ground?

A projectile is thrown from the top of a building with an initial velocity of 30 m/s in the horizontal direction. If the top of the building is 30 m above the ground, how fast will the projectile be moving just before it strikes the ground?

1) 35 m/s
2) 39 m/s
3) 31 m/s
4) 43 m/s
5) 54 m/s









Answer: 2

The speed of a particle moving in a circle 2.0 m in radius increases at the constant rate of 4.4 m/s2. At an instant when the magnitude of the total acceleration is 6.0 m/s2, what is the speed of the particle?

The speed of a particle moving in a circle 2.0 m in radius increases at the constant rate of 4.4 m/s2. At an instant when the magnitude of the total acceleration is 6.0 m/s2, what is the speed of the particle?

1) 3.9 m/s
2) 2.9 m/s
3) 3.5 m/s
4) 3.0 m/s
5) 1.4 m/s







Answer: 2

While the gondola is rising at a speed of 2.0 m/s, a passenger in a balloon-supported gondola throws a small ball down at a speed of 5.0 m/s relative to his body. A person who measures the ball's velocity at the instant of release will find that the ball's velocity relative to the ground at that instant is

While the gondola is rising at a speed of 2.0 m/s, a passenger in a balloon-supported gondola throws a small ball down at a speed of 5.0 m/s relative to his body. A person who measures the ball's velocity at the instant of release will find that the ball's velocity relative to the ground at that instant is

1) 2.0 m/s, up.
2) 3.0 m/s, down.
3) 3.0 m/s, up.
4) 5.0 m/s, down.
5) 12.8 m/s, down.







Answer: 2

A race car moving with a constant speed of 60 m/s completes one lap around a circular track in 50 s. What is the magnitude of the acceleration of the race car?

A race car moving with a constant speed of 60 m/s completes one lap around a circular track in 50 s. What is the magnitude of the acceleration of the race car?

1) 8.8 m/s2
2) 7.5 m/s2
3) 9.4 m/s2
4) 6.3 m/s2
5) 5.3 m/s2





Answer: 2

A car travels in an oval path as shown below. = 25 m/s, West, and = 20 m/s, North. The ratio of the magnitude of the centripetal acceleration at B to that at A, , is:

A car travels in an oval path as shown below. = 25 m/s, West, and = 20 m/s, North. The ratio of the magnitude of the centripetal acceleration at B to that at A, , is:

1) 0.512
2) 0.64
3) 0.8
4) 1.25
5) 1.56






Answer: 1

The pilot of an aircraft flies due north relative to the ground in a wind blowing 40 km/h toward the east. If his speed relative to the ground is 80 km/h, what is the speed of his airplane relative to the air?

The pilot of an aircraft flies due north relative to the ground in a wind blowing 40 km/h toward the east. If his speed relative to the ground is 80 km/h, what is the speed of his airplane relative to the air?

1) 89 km/h
2) 85 km/h
3) 81 km/h
4) 76 km/h
5) 72 km/h








Answer: 1

In a location where the train tracks run parallel to a road, a high speed train traveling at 60 m/s passes a car traveling at 30 m/s in the opposite direction. How long does it take for the train to be 180 m away from the car?

In a location where the train tracks run parallel to a road, a high speed train traveling at 60 m/s passes a car traveling at 30 m/s in the opposite direction. How long does it take for the train to be 180 m away from the car?

1) 2.0 s
2) 3.0 s
3) 6.0 s
4) 9.0 s
5) 18.0 s









Answer: 1

A car travels in a flat circle of radius R. At a certain instant the velocity of the car is 24 m/s west, and the total acceleration of the car is 2.5 m/s2 53° north of west. Which of the following is correct?

A car travels in a flat circle of radius R. At a certain instant the velocity of the car is 24 m/s west, and the total acceleration of the car is 2.5 m/s2 53° north of west. Which of the following is correct?

1) R = 0.29 km, and the car's speed is increasing.
2) R = 0.23 km, and the car's speed is decreasing.
3) R = 0.23 km, and the car's speed is increasing.
4) R = 0.29 km, and the car's speed is decreasing
5) R = 0.29 km, and the car's speed is constant.

Answer: 1

The initial speed of a cannon ball is 0.20 km/s. If the ball is to strike a target that is at a horizontal distance of 3.0 km from the cannon, what is the minimum time of flight for the ball?

The initial speed of a cannon ball is 0.20 km/s. If the ball is to strike a target that is at a horizontal distance of 3.0 km from the cannon, what is the minimum time of flight for the ball?

1) 16 s
2) 21 s
3) 24 s
4) 14 s
5) 19 s








Answer: 1

At t = 0, a particle leaves the origin with a velocity of 9.0 m/s in the positive y direction and moves in the xy plane with a constant acceleration of (2.0i - 4.0j)m/s2. At the instant the x coordinate of the particle is 15 m, what is the speed of the particle?

At t = 0, a particle leaves the origin with a velocity of 9.0 m/s in the positive y direction and moves in the xy plane with a constant acceleration of (2.0i - 4.0j)m/s2. At the instant the x coordinate of the particle is 15 m, what is the speed of the particle?

1) 10 m/s
2) 16 m/s
3) 12 m/s
4) 14 m/s
5) 26 m/s







Answer: 1

An object moving at a constant speed requires 6.0 s to go once around a circle with a diameter of 4.0 m. What is the magnitude of the instantaneous acceleration of the particle during this time?

An object moving at a constant speed requires 6.0 s to go once around a circle with a diameter of 4.0 m. What is the magnitude of the instantaneous acceleration of the particle during this time?

1) 2.2 m/s2
2) 2.7 m/s2
3) 3.3 m/s2
4) 3.8 m/s2
5) 4.4 m/s2








Answer: 1

While her kid brother is on a wooden horse at the edge of a merry-go-round, Sheila rides her bicycle parallel to its edge. The wooden horses have a tangential speed of 6 m/s. Sheila rides at 4 m/s. The radius of the merry-go-round is 8 m. At what time intervals does Sheila encounter her brother, if she rides opposite to the direction of rotation of the merry-go-round?

While her kid brother is on a wooden horse at the edge of a merry-go-round, Sheila rides her bicycle parallel to its edge. The wooden horses have a tangential speed of 6 m/s. Sheila rides at 4 m/s. The radius of the merry-go-round is 8 m. At what time intervals does Sheila encounter her brother, if she rides opposite to the direction of rotation of the merry-go-round?

1) 5.03 s
2) 8.37 s
3) 12.6 s
4) 25.1 s
5) 50.2 s








Answer: 1

A skier leaves a ski jump with a horizontal velocity of 29.4 m/s. The instant before she lands three seconds later, the magnitudes of the horizontal and vertical components of her velocity are:

A skier leaves a ski jump with a horizontal velocity of 29.4 m/s. The instant before she lands three seconds later, the magnitudes of the horizontal and vertical components of her velocity are:

1) 0; 29.4 m/s.

2) 29.4 m/s; 0.

3) 29.4 m/s; 29.4 m/s.

4) 29.4 m/s; 41.6 m/s.

5) 41.6 m/s; 41.6 m/s.








Answer: 3

The area under a graph of vx vs t from t = ti to t = tf represents

The area under a graph of vx vs t from t = ti to t = tf represents

1) xi.

2) xf.

3) xf - xi.

4) (xi + xf).

5) xi + xf.

Answer: 3

A particle moving along the x-axis has a position given by x = 54t - 2.0t3 m. At the time t = 3.0 s, the speed of the particle is zero. Which statement is correct?

A particle moving along the x-axis has a position given by x = 54t - 2.0t3 m. At the time t = 3.0 s, the speed of the particle is zero. Which statement is correct?

1) The particle remains at rest after t = 3.0 s.

2) The particle no longer accelerates after t = 3.0 s.

3) The particle can be found at positions x < 0 m only when t < 0 s.

4) All of the above are correct.

5) None of the above is correct.

Answer: 5

A car travels north at 30 m/s for one half hour. It then travels south at 40 m/s for 15 minutes. The total distance the car has traveled and its displacement are:

A car travels north at 30 m/s for one half hour. It then travels south at 40 m/s for 15 minutes. The total distance the car has traveled and its displacement are:

1) 18 km; 18 km S.

2) 36 km; 36 km S.

3) 36 km; 36 km N.

4) 90 km; 18 km N.

5) 90 km; 36 km N.






Answer: 4

An automobile moving along a straight track changes its velocity from 40 m/s to 80 m/s in a distance of 200 m. What is the (constant) acceleration of the vehicle during this time?

An automobile moving along a straight track changes its velocity from 40 m/s to 80 m/s in a distance of 200 m. What is the (constant) acceleration of the vehicle during this time?

1) 8.0 m/s

2) 9.6 m/s

3) 12 m/s

4) 6.9 m/s

5) 0.20 m/s








Answer: 3

An automobile manufacturer claims that its product will, starting from rest, travel 0.40 km in 9.0 s. What is the magnitude of the constant acceleration required to do this?

An automobile manufacturer claims that its product will, starting from rest, travel 0.40 km in 9.0 s. What is the magnitude of the constant acceleration required to do this?

1) 9.9 m/s2

2) 8.9 m/s2

3) 6.6 m/s2

4) 5.6 m/s2

5) 4.6 m/s2







Answer: 1

A particle confined to motion along the x axis moves with constant acceleration from x = 2.0 m to x = 8.0 m during a 2.5-s time interval. The velocity of the particle at x = 8.0 m is 2.8 m/s. What is the acceleration during this time interval?

A particle confined to motion along the x axis moves with constant acceleration from x = 2.0 m to x = 8.0 m during a 2.5-s time interval. The velocity of the particle at x = 8.0 m is 2.8 m/s. What is the acceleration during this time interval?

1) 0.48 m/s2

2) 0.32 m/s2

3) 0.64 m/s2

4) 0.80 m/s2

5) 0.57 m/s2








Answer: 2

A juggler throws two balls to the same height so that one is at the halfway point going up when the other is at the halfway point coming down. At that point:

A juggler throws two balls to the same height so that one is at the halfway point going up when the other is at the halfway point coming down. At that point:

1) Their velocities and accelerations are equal.

2) Their velocities are equal but their accelerations are equal and opposite.

3) Their accelerations are equal but their velocities are equal and opposite.

4) Their velocities and accelerations are both equal and opposite.

5) Their velocities are equal to their accelerations.

Answer: 3

The position of a particle moving along the x axis is given by x = 6.0t2 - 1.0t3, where x is in meters and t in seconds. What is the position of the particle when it achieves its maximum speed in the positive x direction?

The position of a particle moving along the x axis is given by x = 6.0t2 - 1.0t3, where x is in meters and t in seconds. What is the position of the particle when it achieves its maximum speed in the positive x direction?

1) 24 m

2) 12 m

3) 32 m

4) 16 m

5) 2.0 m






Answer: 4

The position of a particle as it moves along the x axis is given for t > 0 by x = (t3 - 3t2 + 6t) m, where t is in s. Where is the particle when it achieves its minimum speed (after t= 0)?

The position of a particle as it moves along the x axis is given for t > 0 by x = (t3 - 3t2 + 6t) m, where t is in s. Where is the particle when it achieves its minimum speed (after t= 0)?

1) 3 m

2) 4 m

3) 8 m

4) 2 m

5) 7 m

Answer: 2

An object moving on the x axis with a constant acceleration increases its x coordinate by 80 m in a time of 5.0 s and has a velocity of +20 m/s at the end of this time. Determine the acceleration of the object during this motion.

An object moving on the x axis with a constant acceleration increases its x coordinate by 80 m in a time of 5.0 s and has a velocity of +20 m/s at the end of this time. Determine the acceleration of the object during this motion.

1) -1.6 m/s2

2) +6.4 m/s2

3) +1.6 m/s2

4) -2.0 m/s2

5) -6.4 m/s2

Answer: 3

In 20 minutes, Kara ran 2.40 km on a treadmill facing due east. Relative to the gym, what were her displacement and average velocity during this time interval?

In 20 minutes, Kara ran 2.40 km on a treadmill facing due east. Relative to the gym, what were her displacement and average velocity during this time interval?

1) 0; 0

2) 0; 2.00 m/s

3) 2.40 km, east; 0

4) 2.40 km, east; 2.00 m/s, east

5) 2.40 km, west; 2.00 m/s, west

Answer: 1

The velocity of a particle moving along the x axis is given for t > 0 by vx = (32.0t - 2.00t3) m/s, where t is in s. What is the acceleration of the particle when (after t = 0) it achieves its maximum displacement in the positive x direction?

The velocity of a particle moving along the x axis is given for t > 0 by vx = (32.0t - 2.00t3) m/s, where t is in s. What is the acceleration of the particle when (after t = 0) it achieves its maximum displacement in the positive x direction?

1) -64.0 m/s2

2) zero

3) 128 m/s2

4) 32.0 m/s2

5) -32.0 m/s2






Answer: 1

A ball is thrown vertically upward with an initial speed of 20 m/s. Two seconds later, a stone is thrown vertically (from the same initial height as the ball) with an initial speed of 24 m/s. At what height above the release point will the ball and stone pass each other?

A ball is thrown vertically upward with an initial speed of 20 m/s. Two seconds later, a stone is thrown vertically (from the same initial height as the ball) with an initial speed of 24 m/s. At what height above the release point will the ball and stone pass each other?

1) 17 m

2) 21 m

3) 18 m

4) 27 m

5) 31 m






Answer: 1

A boy on a skate board skates off a horizontal bench at a velocity of 10 m/s. One tenth of a second after he leaves the bench, to two significant figures, the magnitudes of his velocity and acceleration are:

A boy on a skate board skates off a horizontal bench at a velocity of 10 m/s. One tenth of a second after he leaves the bench, to two significant figures, the magnitudes of his velocity and acceleration are:

1) 10 m/s; 9.8 m/s2.

2) 9.0 m/s; 9.8 m/s2.

3) 9.0 m/s; 9.0 m/s2.

4) 1.0 m/s; 9.0 m/s2.

5) 1.0 m/s; 9.8 m/s2.

Answer: 1

In 20 minutes, Kara ran 2.40 km on a treadmill facing due east. Relative to the treadmill, what were her displacement and average velocity during this time interval?

In 20 minutes, Kara ran 2.40 km on a treadmill facing due east. Relative to the treadmill, what were her displacement and average velocity during this time interval?

1) 0; 0

2) 0; 2.00 m/s

3) 2.40 km, east; 0

4) 2.40 km, east; 2.00 m/s, east

5) 2.40 km, west; 2.00 m/s, west

Answer: 5

A particle starts from rest at xi = 0 and moves for 10 s with an acceleration of +2.0 cm/s2. For the next 20 s, the acceleration of the particle is -1.0 cm/s2. What is the position of the particle at the end of this motion?

A particle starts from rest at xi = 0 and moves for 10 s with an acceleration of +2.0 cm/s2. For the next 20 s, the acceleration of the particle is -1.0 cm/s2. What is the position of the particle at the end of this motion?

1) zero

2) +3.0 m

3) -1.0 m

4) +2.0 m

5) -3.0 m







Answer: 2

Two identical balls are at rest side by side at the bottom of a hill. Some time after ball A is kicked up the hill, ball B is given a kick up the hill. Ball A is headed downhill when it passes ball B headed up the hill. At the instant when ball A passes ball B,

Two identical balls are at rest side by side at the bottom of a hill. Some time after ball A is kicked up the hill, ball B is given a kick up the hill. Ball A is headed downhill when it passes ball B headed up the hill. At the instant when ball A passes ball B,

1) it has the same position and velocity as ball B.

2) it has the same position and acceleration as ball B.

3) it has the same velocity and acceleration as ball B.

4) it has the same displacement and velocity as ball B.

5) it has the same position, displacement and velocity as ball B.

Answer: 2

A bullet is fired through a board, 14.0 cm thick, with its line of motion perpendicular to the face of the board. If it enters with a speed of 450 m/s and emerges with a speed of 220 m/s, what is the bullet's acceleration as it passes through the board?

A bullet is fired through a board, 14.0 cm thick, with its line of motion perpendicular to the face of the board. If it enters with a speed of 450 m/s and emerges with a speed of 220 m/s, what is the bullet's acceleration as it passes through the board?

1) -500 km/s2

2) -550 km/s2

3) -360 km/s2

4) -520 km/s2

5) -275 km/s2








Answer: 2

The position of a particle as it moves along the x axis is given by x = 15e-2t m, where t is in s. What is the acceleration of the particle at t = 1 s?

The position of a particle as it moves along the x axis is given by x = 15e-2t m, where t is in s. What is the acceleration of the particle at t = 1 s?

1) 22 m/s

2) 60 m/s

3) 8.1 m/s

4) 15 m/s

5) 35 m/s








Answer: 3

A rock is thrown downward from an unknown height above the ground with an initial speed of 10 m/s. It strikes the ground 3.0 s later. Determine the initial height of the rock above the ground.

A rock is thrown downward from an unknown height above the ground with an initial speed of 10 m/s. It strikes the ground 3.0 s later. Determine the initial height of the rock above the ground.

1) 44 m

2) 14 m

3) 74 m

4) 30 m

5) 60 m








Answer: 3

In 2.0 s, a particle moving with constant acceleration along the x axis goes from x = 10 m to x = 50 m. The velocity at the end of this time interval is 10 m/s. What is the acceleration of the particle?

In 2.0 s, a particle moving with constant acceleration along the x axis goes from x = 10 m to x = 50 m. The velocity at the end of this time interval is 10 m/s. What is the acceleration of the particle?

1) +15 m/s2

2) +20 m/s2

3) -20 m/s2

4) -10 m/s2

5) -15 m/s2

Answer: 4