List of top Physics Questions on Work Power and Energy asked in AP EAPCET

A \(5\,\text{kg}\) block pushed by \(100\,\text{N}\) over \(10\,\text{m}\) on a plane. If the coefficient of friction between the block and plane is \(0.2\), then the final kinetic energy of the block is _ _ _ (\(g=10\,\text{m s}^{-2}\)):

A force \(F=4x\) is applied to move an object from \(x=0\) to \(x=2\,m\), then the work done is:

A body is moving in a straight line with constant power. The distance moved by the body in time t is proportional to:

If force, $F=kv^{n}$ (k is constant) and power delivered is independent of velocity 'v', then n equals to:

A body of mass 2 kg is thrown vertically upwards from the ground level with kinetic energy of 240 J. The kinetic energy of the body will become half at a height of (\( g=10 \text{ ms}^{-2} \)):

An object is sliding from the top of the smooth inclined plane of height \( h \) from rest and it just completes a vertical circle of diameter 20 cm. Then the minimum height \( h \) of smooth inclined plane is:

A body of mass 2 kg is thrown vertically upwards from the ground level with kinetic energy of 240 J. The kinetic energy of the body will become half at a height of (\( g=10 \text{ ms}^{-2} \)):

A ball of mass 100 g is projected with velocity 20 $ms^{-1}$ at $60^{\circ}$ with horizontal. The decrease in kinetic energy of the ball during its entire upward journey is:

A block of mass m = 0.1 kg is released from a height of 4 m on a curved smooth surface. On the horizontal surface, path AB is smooth and path BC is rough with a coefficient of friction, $\mu = 0.1$. If the impact of the block with the vertical wall at C is perfectly elastic, the total distance covered by the block on the horizontal surface before coming to rest will be:

A 15 W machine used $(3i + 5j + 6k)$ N force for 6 seconds to lift a body through a distance of X m along x - axis. The value of X is:

A body of mass 3 kg is under a force, which causes a displacement in it given by $S = \frac{t^3}{3}$ (in m). Find the work done by the force in first 2 seconds:

An engine pumps water continuously through a hose pipe. If the water leaves the pipe with velocity $v$ and $m$ is the mass per unit length of the water in the pipe, then the rate at which kinetic energy is imparted to the water is:

An object of mass \(20\ \text{kg}\) is displaced by \[ x=5t^2\ \text{m} \] (where \(t\) is time) by the application of a force. Then the ratio of the work done in times \(3\ \text{s}\) and \(5\ \text{s}\) is

A block of mass \(5 \, \text{kg}\) starts up a \(45^\circ\) incline plane with initial kinetic energy of \(100 \, \text{J}\). If the coefficient of friction between block and plane is \(0.5\), then the distance covered by the block before it stops is \((g=10\,\text{m s}^{-2})\):

A lift raises 50 passengers each having average weight \(600\ \text{N}\) to a height of \(100\ \text{m}\) at a constant speed in time \(T\). If the average power of \(15\ \text{kW}\) is required by the lift, then the value of \(T\) in seconds is

A force of \(5\,\text{N}\) acts on a body initially at rest. If the instantaneous power due to the force at the end of the third second \((t=3\,\text{s})\) is \(5\,\text{W}\), then the mass of the body is

An object of mass \(3\,\text{kg}\) is tied by a string of negligible mass to a ceiling and held such that the string is taut. The object is released suddenly such that the string remains taut. Its acceleration when released is \((g=10\,\text{m/s}^2)\):

A force \[ \vec{F}=4\hat{i}-15\hat{j}\ \text{N} \] acts on a body resulting in a displacement of \[ 6\hat{i}. \] If the body had a kinetic energy of \(7\,\text{J}\) at the beginning of the displacement, then the kinetic energy at the end of the displacement is:

Consider a force \[ F=Kx^3 \] which acts on a particle at rest. The work done by the force for displacement of \(2\,\text{m}\) is \((K=2\,\text{N m}^{-3})\):

A block of mass \(50\,\text{kg}\) is pulled at a constant speed of \(4\,\text{m s}^{-1}\) across a horizontal floor by an applied force of \(500\,\text{N}\) directed \(30^\circ\) above the horizontal. The rate at which the force does work on the block in watt is