A 300. g soccer ball
initially at rest is kicked giving the ball a speed of 45.0 m/s. If
a force of 50.0 N is applied, how long was the foot in contact with the
ball?
A.
0.081 s
C.
0.27 s
B.
0.100 s
D.
0.33 s
F/\t
= m/\v
m/\v
0.300 kg x 45.0 m s -1 /\t = -------- = -------------------------------- = 0.27
seconds
F
50.0 kg m s -2
