21. A cricket ball of mass 100 g moving with a speed of 30m/s is brought to rest by a player in
0.03 s Find; 1 the change in momentum of ball 2 the average force applied by the player.
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Answer:
First we need to calculate retardation of the ball using the formula
" v = u - axt ",
with final speed y = 0 and initial speed u = 30 m/s.
retardation a = u/t = 30/0.03 = 1000 m/s
force = massxretardation = 0.1x1000 = 100 N
Explanation:
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