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

A plank $P$ is placed on a solid cylinder $S$, which rolls on a horizontal surface. The two are of equal mass. There is no slipping at any of the surfaces in contact. The ratio of the kinetic energy of $P$ to the kinetic energy of $S$ is

The velocity of centre of mass of a disc rolling on an inclined plane changes from $V$ to $2 \mathrm{V}$ at any instant of time. If $\mathrm{M}$ is the mass of disc then increases in its kinetic energy will be

A uniform thin ring of mass $0.4 \mathrm{kg}$ rolls without slipping on a horizontal surface with a linear velocity of $10 \mathrm{cm}/\mathrm{s}$. The kinetic energy of the ring is :

The velocity of simple pendulum is maximum at

Two springs with spring constants $K_1=1500 \mathrm{N} {\mathrm{m}}^{-1}$ and $K_2=3000 \mathrm{N} {\mathrm{m}}^{-1}$ are stretched by the same force. The ratio of potential energy stored in spring will be:

The law of conservation of energy implies that the

A rubber ball is dropped from a height of $5 \mathrm{m}$ on a plane. On bouncing, it rises to $1.8 \mathrm{m}.$ The ball loses its velocity on bouncing by a factor of, 

Two balls having mass $2 \mathrm{kg}$ and $3 \mathrm{kg}$ are approaching each other with velocities $3 \mathrm{m} {\mathrm{s}}^{-1}$ and $2 \mathrm{m} {\mathrm{s}}^{-1}$ respectively on the horizontal frictionless surface. They undergo a head-on elastic collision. Find out the maximum potential energy of deformation.