Question

A ball of mass 10 kg is moving with a velocity 20 metre per second if the mass of a body is doubled and its velocity is half and the initial kinetic energy and the final kinetic energy​

Answer 1

Answer:

ANSWER

Given , Mass of object  ,m=10 kg

Velocity of object , v=20ms−1

Initial Kinetic energy , K1=21×10×202=2000 J

Now Final mass  ,m2=20 kg

Final Velocity , v2=10m/s

Final Kinetic energy , K2=21×20×102=1000 J

Required Ratio=K2K1=10002000=2

Answer 2

Explanation:

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