A 20 Kg Mass Is Moving in a Circular Path with with a Radius

Multiple Choice

A 2.0 kg mass is moving in a circular path with a radius of 5.00 cm. The mass starts from rest and, with constant angular acceleration, obtains an angular velocity of 6.00 rad/sec in 3.00 sec. The mass then comes to a stop with constant angular acceleration in 4.00 sec. The radial component of acceleration of the mass at 5.00 sec after the start is

A) 2.50 m/s².
B) 2.03 m/s².
C) 1.25 m/s².
D) 0.980 m/s².
E) 0.450 m/s².