List of top Physics Questions on work, energy and power asked in AP ECET Ceramic Tech

Power supplied to a particle of mass \(2\ \text{kg}\) varies with time as \[ P=\frac{3t^2}{2}\ \text{watt}, \] where \(t\) is in seconds. If velocity at \(t=0\) is zero, the velocity at \(t=2\ \text{s}\) is

A pump is used to deliver water at a certain rate from a given pipe. To obtain twice the volume of water from the same pipe in the same time, by what factor must the power of the motor pump be increased? Assume ideal conditions.

A body of mass \(1\ \text{kg}\) starts moving from rest under the action of a force which varies with displacement as \(F=2x+5\) in newtons. The work done by this force to displace the body from \(x=0\) to \(x=2\ \text{m}\) is

The potential energy of a particle is given by \(U(x)=20+(x-2)^2\), where \(U\) is in joules and \(x\) is in meters. The minimum potential energy and the position where it occurs are

A body of mass \(2\text{ kg}\) changes its velocity from \((3\hat{i}-4\hat{j})\text{ m/s\) to \((6\hat{j}+2\hat{k})\text{ m/s}\). What is the change in kinetic energy of the body?}

At her maximum height a girl in a swing is \(3\text{ m}\) above the ground and at the lowest point she is \(2\text{ m}\) above the ground. Her maximum velocity is

An engine delivers \(1000\text{ watt}\) of power with \(80\%\) efficiency. The input power is

A body of mass \(2\text{ kg}\) changes its velocity from \((3\hat{i}-4\hat{j})\text{ m/s\) to \((6\hat{j}+2\hat{k})\text{ m/s}\). What is the change in kinetic energy of the body?}

At her maximum height a girl in a swing is \(3\text{ m}\) above the ground and at the lowest point she is \(2\text{ m}\) above the ground. Her maximum velocity is

An engine delivers \(1000\text{ watt}\) of power with \(80\%\) efficiency. The input power is