Work, Energy and Power questions
712 published questions with worked solutions.
- The minimum speed for a particle at the lowest point of a vertical circle of radius r, to complete the circle, is v. If the...
- An object moves along a straight-line path from P to Q under the action of a force (4 -3 +3 k) N. If the coordinates of P and Q,...
- A force F = -K(y +x ) (where K is a positive constant) acts on a particle moving in the x–y plane. Starting from the origin, the...
- A force of (7 +6 k) N makes a body move on a rough plane with a velocity of (3 +4 k) , ms ^ -1 . Calculate the power, in watt.
- A force of (10 -3 +6 k) N acts on a body of mass 100 g and displaces it from (6 +5 -3 k) m to (10 -2 +7 k) m. The work done is
- A force F = 2 +2 N displaces a particle through S = 2 +2 k m in 16 s. The power developed by F is
- A point of application of a force F = 5 -4 +2 k is moved from r_1 = 2 +7 +4 k to r_2 = 5 +2 +3 k. The work done is
- Work done when a force F = ( +2 +3 k) N acting on a particle takes it from the point r_1 = ( + + k) m to the point r_2 = ( - +2...
- A body constrained to move in the Y-direction is subjected to a force F = (-2 +15 +6 k) N. What work is done by this force in...
- When a body moves in a circular path, no work is done by the (centripetal) force since
- A sphere of mass m is tied to the end of a string of length l and rotated, through the other end, along a horizontal circular...
- A body of mass 100 g is rotating in a circular path of radius r with constant velocity. The work done in one complete revolution...
- A weightless thread can support tension up to 30 N. A stone of mass 0.5 kg is tied to it and is revolved in a circular path of...
- A cane filled with water is revolved in a vertical circle of radius 4 m and the water just does not fall down. The time period of...
- A weightless thread can bear tension up to 3.7 kg-wt. A stone of mass 500 gm is tied to it and revolved in a circular path of...
- A ball is moving to and fro about the lowest point A of a smooth hemispherical bowl. If it is able to rise up to a height of 20...
- A block of mass m at the end of a string is whirled round in a vertical circle of radius R. The critical speed of the block at...
- A particle is moving in a vertical circle. The tensions in the string, when passing through two positions at angles 30^ and 60^...
- A simple pendulum oscillates in a vertical plane. When it passes through the mean position, the tension in the string is 3 times...
- A pendulum bob on a 2 m string is displaced 60^ from the vertical and then released. What is the speed of the bob as it passes...
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