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If E is the kinetic energy of a body of mass m moving with velocity v, then:

1. E = mv²
2. E = p² / 2m
3. E = p² / m
4. E = 2mE

Correct answer: E = p² / 2m

Solution

The kinetic energy of a body is given by E = (1/2)mv². Momentum p is given by p = mv. Substituting p = mv into the kinetic energy formula, we get E = p² / 2m.

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