Embibe Experts Solutions for Chapter: Work, Energy and Power, Exercise 1: AP EAPCET 2018 (25-APR Shift-1)

A body of mass $8 \mathrm{kg}$, under the action of a force, is displaced according to the equation $s=\frac{t^2}{4} \mathrm{m},$ where $\text{'}t\text{'}$ is the time. Find the work done by the force in the first $4$ seconds.

A particle is kept on the surface of a uniform sphere of mass $1000 \mathrm{kg}$ and radius $1 \mathrm{m}$. The work done per unit mass against the gravitational force between them is

A sphere of mass $\text{'}m\text{'}$ is attached to a spring of spring constant $\text{'}k\text{'}$ and is held in unstretched position over an inclined plane as shown in the figure. After letting the sphere go, find the maximum length by which the spring extends, given the sphere only rolls.

What is the shape of the graph between speed and kinetic energy of a body?

Two bodies having kinetic energy in the ratio $4: 1$, are moving with same linear velocity. The ratio of their masses is

A quarter horse power motor runs at a speed of $600 \mathrm{rpm}.$ Assuming $60\%$ efficiency, the work done by the motor in one rotation is

An engine develops $20 \mathrm{kW}$ of power. How much time will it take to lift a mass of $200 \mathrm{kg}$ to a height of $40 \mathrm{m}?\left( g=10 \mathrm{m} {\mathrm{s}}^{-2}\right)$

Water is falling on the blades of a turbine from a height of $25 \mathrm{m}.3\times {10}^3 \mathrm{kg}$ of water pours on the blade per minute. If the whole of energy is transferred to the turbine, power delivered is: