A hockey ball at rest, is hit by a hockey stick, such that the force acts on the ball for 0.08 s. If the ball is of mass 100 g and covers a distance of 80 m in 1.6 s, find the magnitude of force.
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Explanation:
initial velocity of ball, u= 0 m/s(since the ball is at rest)
distance travelled , s= 80 m
t=1.6 seconds
velocity of ball after it was hit=distance/time
=80/1.6
=50 m/s
applying 1st equation of motion
a=v-u/t
a=50/0.08
a=5000/8
a=625m/s^2
force=mass x acceleration
force=0.1 x 625
force=62.5 Newton
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