Question

A 60.0 kg soccer player kicks a 0.4000 kg stationary soccer ball with 6.25 N of force. How fast does the soccer ball accelerate, assuming that no friction acts on the ball?
a)2.50 m/s2
b)3.84 m/s2
c)15.6 m/s2
d)97.7 m/s2

Answer 1

F = ma
6.25 N = 0.4 kg · a
a = (6.25/0.4) m/s²      since N=kg·m/s²
a = 15.625 m/s² 

The answer is c) 15.6 m/s²
(Note that the mass of the soccer player is irrelevant.)