$A$ bullet of mass $50 \ g$ is fired with a speed $100 \ m/s$ on a plywood and emerges with $40 \ m/s$. The percentage loss of kinetic energy is:

The kinetic energy of an object decreases by $19\%$. What is the percentage decrease in its momentum?

$A$ ball of mass $2\,kg$ and another of mass $4\,kg$ are dropped together from a $60\,ft$ tall building. After a fall of $30\,ft$ each towards the earth,their respective kinetic energies will be in the ratio of:

If the momentum of a body increases by $0.01\%$,its kinetic energy will increase by ........... $\%$

If $p$ is the linear momentum of an object and $v$ is its velocity,write the formula for its kinetic energy.

The kinetic energy possessed by a body of mass $m$ moving with a velocity $v$ is equal to $\frac{1}{2}mv^2$,provided