Work, Energy and Power questions
712 published questions with worked solutions.
- A body moves a distance of 5 m along a straight line under the action of a force of 10 N. If the work done is 25 J, then the...
- A force F = Ay² + By + C acts on a body in the y-direction. The work done by this force during a displacement from y = −a to y =...
- The work done in dragging a stone of mass 100 kg up an inclined plane 1 in 100, through a distance of 10 m is (g = 9.8 ms⁻²)
- A body of mass 10 kg is moving on a horizontal surface by applying a force of 10 N in the forward direction. If the body moves...
- In a children's park, there is a slide which has a total length of 10 m and a height of 8.0 m. A vertical ladder is provided to...
- A person holds a bucket of weight 60 N. He walks 7 m along the horizontal path and then climbs up a vertical distance of 5 m. The...
- In a certain situation, **F** and **s** are not equal to zero, but the work done is zero. From this we conclude that
- A 5 kg stone of relative density 3 is resting at the bed of a lake. It is lifted through a height of 5 m in the lake. If g = 10...
- In which of the following cases can the work done increase the potential energy?
- Under the action of a force, a 2 kg body moves such that its position x as a function of time t is given by x = t³/3, where x is...
- A 2.0 kg block is dropped from a height of 40 cm onto a spring of spring constant k = 1960 N m⁻¹. Find the maximum distance the...
- A force of 5 N moves a particle through a distance of 10 m. If 25 J of work is performed, then the angle between the force and...
- A spring of spring constant 5 × 10³ N m⁻¹ is stretched initially by 5 cm from the unstretched position. Then the work required to...
- A 5 kg brick of 20 cm × 10 cm × 8 cm dimensions lying on its largest base is now made to stand with length vertical. If g = 10...
- A uniform chain of length L and mass M overhangs a horizontal table with its two-thirds part on the table. The friction...
- A mass M is lowered with the help of a string by a distance h at a constant acceleration g/2. The work done by the string will be
- A position-dependent force F = 3x² − 2x + 7 acts on a body of mass 7 kg and displaces it from x = 0 m to x = 5 m. The work done...
- The displacement x (in metre) of a particle of mass m kg moving in one dimension under the action of a force is related to time t...
- A block of mass 10 kg slides down a rough slope which is inclined at 45° to the horizontal. The coefficient of sliding friction...
- A spring of force constant 800 N m⁻¹ has an extension of 5 cm. The work done in extending it from 5 cm to 15 cm is
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