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