Work, Energy and Power questions
712 published questions with worked solutions.
- A car starts from a station and moves along the horizontal road by a machine delivering constant power. The distance covered by...
- A ball of mass 0.2 kg is thrown vertically upward by applying a force by hand. If the hand moves 0.2 m while applying the force...
- A bullet of mass 0.05 kg moving with a speed of 80 ms⁻¹ enters a wooden block and is stopped after a distance of 0.40 m. The...
- A force of 4 N is applied on a body of mass 20 kg, initially at rest. The work done by this force in the 3rd second is
- When the speed of a moving body is doubled, [UP SEE 2004]
- A steel wire can withstand a load up to 2940 N. A load of 150 kg is suspended from a rigid support. The maximum angle through...
- **Statement 1:** Frictional forces are non-conservative forces. **Statement 2:** Potential energy cannot be associated with...
- The coefficient of kinetic friction between a 20 kg box and the floor is 0.40. How much work does a pulling force do on the box...
- The mass of a ship is 2 × 10⁷ kg. On applying a force of 25 × 10⁵ N, it is displaced through 25 m. After the displacement, the...
- When the speed of a moving body is doubled,
- A ball of mass 0.2 kg is thrown vertically upwards by applying a force by hand. If the hand moves 0.2 m while applying the force,...
- **Statement I:** The work done in bringing a body down from the top to the base along a frictionless incline plane is the same as...
- Work done by a frictional force is
- A man drags a block through 10 m on rough surface (μ = 0.5). A force of √3 kN acting at 30° to the horizontal. The work done by...
- A 60 kg weight is dragged on a horizontal surface by a rope upto 2 metres. If coefficient of friction is μ = 0.5, the angle of...
- A body of mass 5 kg rests on a rough horizontal surface of coefficient of friction 0.2. The body is pulled through a distance of...
- A force of 20 N is applied on a body of mass 5 kg resting on a horizontal plane. The body gains a kinetic energy of 10 joule...
- A block of mass 50 kg slides over a horizontal distance of 1 m. If the coefficient of friction between their surface is 0.2, then...
- A body of mass 2 kg is being dragged with uniform velocity of 2 m/s on a rough horizontal plane. The coefficient of friction...
- A 2 kg mass starts from rest on an inclined smooth surface with inclination 30° and length 2 m. How much will it travel before...
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