Work, Energy and Power questions
712 published questions with worked solutions.
- Gravitational field is **[BVP 2009]**
- The force of gravitation is [AIIMS 2002]
- Assertion: A force acts upon the earth revolving in a circular orbit about the sun; hence work should be done on the earth....
- When a 4 kg mass is hung vertically on a light spring that obeys Hooke's law, the spring stretches by 2 cm. The work required to...
- Statement 1: The restoring force F and a stretched string for extension x are related to potential energy U as F=- dU dx ....
- K is the force constant of a spring. The work done in increasing its extension from l_1 to l_2 will be [MP PET 1995, MP PMT 1996]
- When a spring is stretched by a distance x, it exerts a force, given by F=(-5x-16x^3)N. The work done, when the spring is...
- Kilowatt-hour is a unit of **[AFMC 1991, Similar Kerala PMT 2009]**
- Unit of power is **[CPMT 1985, DCE 1999]**
- A body is being revolved in a vertical circle of radius R with the critical (minimum) speed needed to just complete the circle....
- A bucket of water tied to a rope of length 0.5 m is whirled in a vertical circle. The least velocity it must have at the lowest...
- A bob of mass m, attached to an inextensible string of length L, is given a horizontal velocity at the lowest point equal to the...
- A can filled with water is revolved in a vertical circle of radius 4 m, and the water just does not spill out. The maximum time...
- A small object is placed at rest at the topmost point of a smooth sphere of radius R and given a gentle push. It slides down the...
- A stone of mass 500 g, tied to a weightless thread, is whirled in a vertical circle of radius 4 m (g=10 m/s ^2). If the maximum...
- In a vertical circle of radius 2.5 m, the ratio of the maximum to the minimum tension in the string is 5:3. The speed of the body...
- When a body moves in a circular path, no work is done by the (centripetal) force since **[K CET 2004]**
- A body tied to one end of a string is whirled in a vertical circle. The physical quantity that remains constant throughout the...
- A particle of mass m is tied to one end of a string of length l, whose other end is fixed, and is rotated along a horizontal...
- A constant-magnitude force acts on a particle always perpendicular to its velocity. The particle's kinetic energy
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