A ball hits a wall horizontally at 6m/s. It rebounds horizontally at 4.4m/s. The ball is in contact with the wall for 0.04s. What is the acceleration of the ball?
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initial velocity = 6 m/second
final velocity = 4.4 m/second
time = 0.04 second
acceleration = final - initial /time
= 4.4 - 6 /0.04
= -40 m^2
it's retardation is - 40
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