Find the kinetic energy of a ball of mass 500 gm moving with a speed of 20 m/s. Solve it
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A ball of mass 500 g hits a wall with a velocity 10 ms
−1
such that it makes an angle of 60
o
with the normal. It bounces back with the same speed making an angle of 60
o
with the normal. Determine the change in momentum.
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