Embibe Experts Solutions for Chapter: Work, Energy and Power, Exercise 1: JKCET 2017

A force $F=3x^2+2x+1$ acts on a body in the $x$-direction. The work done by this force during a displacement from $x=-1$ to $+1$ is

A cyclist comes to a skidding stop in $10 \mathrm{m}$. During this process, the force on the cycle due to the road is $200 \mathrm{N}$ and is directly opposed to the motion. How much work does the road do on the cycle?

The work done by a given force on a body depends only on

A body of mass $2 \mathrm{kg}$ is thrown vertically up so that its kinetic energy is $490 \mathrm{J}$. $\left(g=9.8 \mathrm{m}/{\mathrm{s}}^2\right)$. The height at which the kinetic energy becomes half the original value is