Work, Energy and Power questions
712 published questions with worked solutions.
- The kinetic energy acquired by a mass m in travelling a certain distance d, starting from rest, under the action of a constant...
- A force F = −K(yî+xĵ) (where K is a positive constant) acts on a particle moving in the x-y plane. Starting from the origin, the...
- A particle free to move along the x-axis has potential energy given by U(x) = k[1 − exp(−x²)] for −∞ ≤ x ≤ ∞, where k is a...
- A lorry and a car moving with the same kinetic energy are brought to rest by applying the same retarding force, then [IIT JEE...
- The potential energy of a conservative system is given by V(x) = (x² − 3x) joule. Then its equilibrium position is at [Kerala PMT...
- Statement 1: According to the law of conservation of mechanical energy, change in potential energy is equal and opposite to the...
- Statement 1: Graph between potential energy of a spring versus the extension or compression of the spring is a straight line....
- Statement 1: Work done by friction on a body sliding down an inclined plane is positive. Statement 2: Work done is greater than...
- Statement 1: Work done in the motion of a body over a closed loop is zero for every force in nature. Statement 2: Work done does...
- Statement 1: Power of a machine gun is determined by both, the number of bullets fired per second and the kinetic energy of the...
- Statement 1: A spring has potential energy, both when it is compressed or stretched. Statement 2: In compressing or stretching,...
- Statement 1: When a force retards the motion of a body, the work done is zero. Statement 2: Work done depends on the angle...
- Statement 1: Kinetic energy of a body is quadrupled, when its velocity is doubled. Statement 2: Kinetic energy is proportional to...
- Statement 1: Power developed in uniform circular motion is always zero. Statement 2: Work done in case of uniform circular motion...
- Statement 1: A light body and a heavy body have the same momentum. Then they also have the same kinetic energy. Statement 2:...
- Statement 1: Work done by or against the gravitational force in moving a body from one point to another is independent of the...
- Statement 1: Comets move around the sun in elliptical orbits. The gravitational force on the comet due to the sun is not normal...
- Statement 1: The change in kinetic energy of a particle is equal to the work done on it by the net force. Statement 2: The change...
- A horizontal force of 5 N is required to maintain a velocity of 2 m/s for a block of 10 kg mass sliding over a rough surface. The...
- The slope of the kinetic energy-displacement curve of a particle in motion is
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