List of top Physics Questions on Work Power Energy

The velocity-time graph for a body of mass \( 10\,\text{kg} \) is shown. Work done on the body in the first two seconds of motion is 

The work done by the force of gravity on a satellite moving in a circular orbit around the Earth is:
A body of mass 2 kg is raised to a height of 5 m. What is the potential energy gained? (Take $ g = 10 \, \text{m/s}^2 $)
How much work is done to slide a crate for a distance of 25 m along a loading dock by pulling on it with a 180 N force where the dock is at an angle of 45∘45^\circ45∘ from the horizontal?
A small sphere of mass m and radius R slides down the smooth surface of a large hemispherical bowl of radius R. If the sphere starts sliding from rest, the total kinetic energy of the sphere at the lowest point A of the bowl will be:
Hemispherical Ball
The following figure shows the variation of potential energy V (x) of a particle with distance x. The particle has:
variation of potential energy
A family uses 8 kW of power. Direct solar energy is incident on the horizontal surface at an average rate of 200 W per square meter. If 20% of this energy can be converted to useful electrical energy, how large an area is needed to supply 8 kW? }
A 40 kg boy whose legs are 4 $cm^{2}$ in area and 50 cm long falls through a height of 2 m without breaking his leg bones. If the bones can withstand a stress of 0.9 $\times10^{8}N/m^{2}.$ The Young's modulus for the material of the bone is ________.
The length of a metal wire is $l_{1}$ when the tension is $T_{1}$ and $l_{2}$ when the tension is $T_{2}$. The unstretched length of the wire is ________.
Two cylinders A and B of the same material have same length, their radii being in the ratio 1: 2 respectively. The two are joined end to end as shown in the figure. One end of cylinder A is rigidly clamped while free end of cylinder B is twisted through an angle $\theta$. The angle of twist of cylinder A is ________.
A body moves from point A to B under the action of a force, varying in magnitude as shown in the figure. Force is expressed in newton and displacement in meter. What is the total work done? }
The linear momentum is increased by 50%, the kinetic energy will increase by
A force of 20 N acts on a body of mass 2 kg initially at rest. Find the work done in 2 s.
The momentum of a body is increased by 25%. The kinetic energy is increased by about