Work, Energy and Power questions
712 published questions with worked solutions.
- A block of mass 5 kg is resting on a smooth surface. At what angle a force of 20 N be acted on the body so that it acquires a...
- The slope of the kinetic energy versus position vector graph gives the rate of change of
- A body of mass 1 kg is thrown upwards with a velocity 20 m/s. It momentarily comes to rest after attaining a height of 18 m. How...
- The work done in pulling up a block of wood weighing 2 kN for a length of 10 m on a smooth plane inclined at an angle of 15° with...
- A force of 5 N acts on a 15 kg body initially at rest. The work done by the force during the first second of motion of the body is
- The work done against gravity in taking 10 kg mass at 1 m height in 1 sec will be [RPMT 2000]
- A force acts on a 30 g particle in such a way that the position of the particle as a function of time is given by x = 3t − 4t² +...
- A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 joules, the...
- A man starts walking from a point on the surface of the earth (assumed smooth) and reaches the diagonally opposite point. What is...
- A ball of mass m moves with speed v and strikes a wall having infinite mass and it returns with the same speed. Then the work...
- A body of mass 5 kg is placed at the origin, and can move only on the x-axis. A force of 10 N is acting on it in a direction...
- A body of mass 10 kg is dropped to the ground from a height of 10 metres. The work done by the gravitational force on the body is...
- The kinetic energy acquired by a body of mass m in travelling a certain distance s, starting from rest, under the action of a...
- A force of 5 N, making an angle θ with the horizontal, acting on an object displaces it by 0.4 m along the horizontal direction....
- You lift a heavy book from the floor of the room and keep it in the book-shelf having a height of 2 m. In this process you take 5...
- A 50 kg man with a 20 kg load on his head climbs up 20 steps of 0.25 m height each. The work done in climbing is
- A man pushes a wall and fails to displace it. He does [CPMT 1992, Kerala PMT 2007]
- The potential energy function for the force between two atoms in a diatomic molecule is approximately given by U(x) = a/x¹² −...
- A particle moves under the effect of a force F = Cx from x = 0 to x = x₁. The work done in the process is
- A variable force, given by the 2-dimensional vector F = (3x²î + 4ĵ), acts on a particle (F in newton, x in metre). What is the...
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