A Body Is Acted Upon by a Force of 10

Multiple Choice

A body is acted upon by a force of 10 N and undergoes a displacement in the direction of the force in accordance with the relation s = 3t² + 2t,where s is the displacement in meters and t is in seconds.The rate at which the force is doing work at the instant t = 2 s is

A) 14 W
B) 12 W
C) 120 W
D) 140 W
E) 160 W