Work, Energy and Power questions
712 published questions with worked solutions.
- A light and a heavy body have equal momenta. Which one has greater K.E. [MP PMT 1985, CPMT 2004, Kerala PMT 2004]
- A spherical ball of mass 20 kg is stationary at the top of a hill of height 100 m. It slides down a smooth surface to the ground,...
- According to the work-energy theorem, the work done by the net force on a particle is equal to the change in its [Kerala PMT 2009]
- A mass m slips along the wall of a semispherical surface of radius R. The velocity at the bottom of the surface is
- Which among the following, is a form of energy [DCE 2004]
- If a man increases his speed by 2 m/s, his K.E. is doubled. The original speed of the man is [Pb. PET 2002]
- If the momentum of a body is increased by 100%, then the percentage increase in the kinetic energy is
- If velocity of a body is twice of the previous velocity, then kinetic energy will become
- A machine, which is 75 percent efficient, uses 12 joules of energy in lifting up a 1 kg mass through a certain distance. The mass...
- The kinetic energy possessed by a body of mass m moving with a velocity v is equal to ½mv², provided
- A particle of mass m at rest is acted upon by a force F for a time t. Its kinetic energy after an interval t is
- A ball is released from a certain height. It loses 50% of its kinetic energy on striking the ground. It will attain a height...
- An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a velocity of 2 m/s. The mass per...
- A body of mass 2 kg is projected at 20 m/s at an angle of 60° above the horizontal. Power on the block due to the gravitational...
- The power of a pump, which can pump 200 kg of water to a height of 50 m in 10 sec, will be [DPMT 2003, Similar AMU (Med.) 2002]
- A 10 H.P. motor pumps underground water to fill a tank of volume 22380 litres at a height of 10 m from the ground. If it took 5...
- A force (4î + ĵ − 2k̂) N acting on a body maintains its velocity at (2î + 2ĵ + 3k̂) ms⁻¹. The power exerted is
- A particle of mass M starting from rest undergoes uniform acceleration. If the speed acquired in time T is V, the power delivered...
- A body projected vertically upward returns to the ground, having been acted on by a resistive force as well as gravity. The power...
- A body is initially at rest. It undergoes one-dimensional motion with constant acceleration. The power delivered to it at time t...
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