V K Sally and R Goel Solutions for Chapter: Work and Energy, Exercise 9: EXERCISE

The potential energy of $100 \mathrm{kg}$ of water at a height of $25 \mathrm{m}$ is: [$\mathrm{g}=10 {\mathrm{ms}}^{-2}$]

A large box is taken to a height of $8 \mathrm{m}$, when energy spent is $64,000 \mathrm{J}$. The mass of the box is: [$\mathrm{g}=10 \mathrm{m} {\mathrm{s}}^{-2}$ ]

The kinetic energy of a dog of mass $16 \mathrm{kg}$ and running at constant speed of $12 \mathrm{m} {\mathrm{s}}^{-1}$ is:

A truck and a car are running at same speed. If the mass of truck is $10$ times that of the car, the ratio of kinetic energy of truck and car is:

Two bodies A and B of masses $4 \mathrm{kg}$ and $16 \mathrm{kg}$ respectively have same kinetic energy. The ratio of velocity of A and B is :  

The velocity of the particle of mass $10 \mathrm{kg}$ and its kinetic energy$50 \mathrm{J}$ is

A high jumper can jump $2.5 \mathrm{m}$ on the surface of the earth. He can jump on the surface of the moon to a height of:

The speed of a motorbike decreases by $4$ times. Its kinetic energy will decrease by: