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Question

A horse and a dog are running at a same speed . The mass of horse 12 times of mass of dog. Find out ratio of their kinetic energies.

A
1:5
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B
1:12
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C
12:1
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D
1:6
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Solution

The correct option is C 12:1


The kinetic energy of a moving object is given by: 12mv2.
Therefore, if t
he mass of horse 12 times the mass of dog, then the kinetic energy of the horse will be 12 times the kinetic energy of the dog.
Hence, the ratio of the kinetic energies of the horse and the dog is 12:1.


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