NCERT Exemplar XV — task. Science CBSE, Class 9.

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A light and a heavy object have the same momentum. Find out the ratio of their kinetic energies. Which one has a larger kinetic energy?

The formula to calculate the Momentum is,

\(Momentum\ =\ \frac{Mass}{displacement}\)
\(Momentum\ =\ \frac{Mass}{Velocity}\)
\(Momentum\ =\ Mass \times Velocity\)
\(Momentum\ =\ Mass \times displacement\)

Kinetic Energy \({E_k}\) is given by the expression,

\(E_k\ =\ \frac{1}{2}\ m \times v^2\)
\(E_k\ =\ m \times v^2\)
\(E_k\ =\ \frac{1}{2}\ m \times v\)
\(E_k\ =\ \frac{m}{v^2}\)

Light object has kinetic energy than Heavy object.

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