Work, Energy and Power questions
712 published questions with worked solutions.
- A particle of mass m is driven by a machine that delivers a constant power k watts. If the particle starts from rest the force on...
- What is the minimum velocity with which a body of mass m must enter a vertical loop of radius R so that it can complete the loop?
- A body of mass 1 kg begins to move under the action of a time dependent force F = (2t , i + 3t^2 , j ) N , where i and j are unit...
- A mass m is attached to a thin wire and whirled in a vertical circle. The wire is most likely to break when:
- A force F = 20 + 10y acts on a particle in y-direction where F is in newton and y in meter. Work done by this force to move the...
- A string of pendulum of length 'L' is displaced through 90^ from the vertical and released. Then the maximum strength of the...
- A carpet of mass 'M' made of an material is rolled along is length in the form of a cylinder of radius 'R' and kept above the...
- A can filled with water is revolved in a vertical circle of radius 'r' and water just does not fall down. The time period of...
- A gardener pushes a lawn roller through a distance 20m. If he applies a force of 30kg –wt in a direction inclined at 60^0 to the...
- A weightless string can support a tension up to 30N. A stone of mass 0.5 kg is tied to its one end and is revolved in a circular...
- A ball of mass 'm' is dropped from a height 's' on a horizontal platform fixed at the top of vertical spring. The platform is...
- If a lighter body mass 'M1' and velocity 'V1' and a heavy body (mass M2 and velocity V2) have the same kinetic energy then
- If the momentum of a body of mass 'm' is increased by 20% then its kinetic energy increases by
- For a particle moving in vertical circle, the total energy at different positions along the path [The motion is under gravity]
- A bucket containing water is revolved in a vertical circle of radius r. To prevent the water from falling down, the minimum...
- A body of mass 'm' attached at the end of a string is just completing the loop in a vertical circle. The apparent weight of the...
- A block is fastened to a horizontal spring. The block is pulled to a distance x = 10 cm from its equilibrium position (at x = 0)...
- A solid cylinder of mass 3 Kg is rolling on a horizontal surface with velocity 4 m/s. It collides with a horizontal spring whose...
- A bucket containing water is revolved in vertical circle of radius r. To prevent the water from falling down, the period of...
- A body of mass 1 kg starts from rest and moves with uniform acceleration. In 2 second, its velocity is 10 m/s. The power exerted...
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