Subject Experts Solutions for Chapter: Work, Energy and Power, Exercise 1: Target Exercise

You lift a heavy book from the floor of the room and keep it on the bookshelf having a height of $2 \mathrm{m}$. In this process, you take $5 \mathrm{s}$. The work done by you will depend upon

A lorry and a car moving with the same $KE$ are brought to rest by applying the same retarding force, then

A man starts walking from a point on the surface of the earth (assumed smooth) and reaches diagonally opposite point. What is the work done by him?

A total of $490 \mathrm{J}$ energy was used in lifting a $5 \mathrm{kg}$ mass. The mass was raised to

When the momentum of a body decreased by $10\%$, its $KE$ will be decreased by

A force $20 \mathrm{N}$ displaces an object $10 \mathrm{cm}$ and does work of $1\mathrm{J}$ in the process. Find the angle between the force and the displacement.

Which of the following graph shows the graphical relation between momentum $p$ and kinetic energy $K$ for a body in motion.

The diagram shows the velocity versus time plot for a particle, the work done by the force on the particle is positive from