A ball of mass 1 kg slows down from a speed of 5 m/s to that of 3 m/s. Calculate the change in kinetic energy of the ball.
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Explanation:
M=1kg v(initial)=5m/s V(final)=3m/s
change in K.E=1/2×M×V×V-1/2×M×v×v
=1/2×0.5×9-1/2×1×25
=2.25-12.5
= -10. 5
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