if the velocity of the body becomes two-fifth of initial, then find the ratio of new kinetic energy to old kinetic energy
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Answer:
the ratio of new Kinetic energy to the old kinetic energy is 4/25
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Explanation:
ratio
new ke : old ke
= 1/2m( 2/5 V)² : 1/2mV²
= (2/5 V)² : V²
=. 4/25 V² : V²
= 4/25 : 1
= 4 : 25
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