A Block Is Pushed Across a Horizontal Surface by the Force

Multiple Choice

A block is pushed across a horizontal surface by the force shown. If the coefficient of kinetic friction between the block and the surface is 0.30, F = 20 N, $\theta$ = 30 $\degree$ , and M = 3.0 kg, what is the magnitude of the acceleration of the block?

A) 2.8 m/s2
B) 2.3 m/s2
C) 1.8 m/s2
D) 3.3 m/s2
E) 5.4 m/s2