A car is moving with a speed of $100\mathrm{ }\mathrm{k}\mathrm{m }{\mathrm{h}}^{-1}$. If the mass of the car is 950 kg, then its kinetic energy is

A car driver is trying to jump across a path as shown in figure by driving horizontally off a cliff $\text{'}X\text{'}$ at the speed $10 \mathrm{m} {\mathrm{s}}^{-1}$. When he touches peak $Z$ (ignore air resistance), what would be speed? (use $g=10 \mathrm{m} {\mathrm{s}}^{-2}$)

A bullet of mass $10 g$ pierces through a plate $A$ of mass $500 \mathrm{g}$ and then gets embedded into a second plate $B$ of mass $1.49 \mathrm{kg}$ as shown in the figure. Initially the two plates $A$ and $B$ are at rest and move with same velocity after collision. The percentage loss in the initial kinetic energy of the bullet when it is between the plates $A$ and $B$ is_______. (Neglect any loss of material of the plates during the collision)