How does the kinetic energy of a moving body depend on its (i) speed, and (ii) mass?

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Solution

(i) The kinetic energy of a body is directly proportional to the square of its velocity. i.e. $K . E . \propto v^{2}$

(ii) The kinetic energy of a body is directly proportional to its mass. i.e. $K . E . \propto m$

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