A 30-Kg Block Is on a Frictionless Horizontal Surface

Multiple Choice

A 3.0-kg block is on a frictionless horizontal surface. The block is at rest when, at t = 0, a force (magnitude P = 2.0 N) acting at an angle of 22° above the horizontal is applied to the block. At what rate is the force P doing work at t = 2.0 s?

A) 2.3 W
B) 2.0 W
C) 1.4 W
D) 1.7 W
E) 1.2 W