If the velocity of the body becomes double its kinetic energy will become
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kinetic energy would become 4 times then original.
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=> KE = 1/2 mv²
=> KE ' = 1/2m(2v)²=2mv²
Hence , KE ' = 4KE
=> KE ' = 1/2m(2v)²=2mv²
Hence , KE ' = 4KE
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