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When a body falls freely towards the earth, then its total energy______.

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Important Questions on Work, Energy and Power

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A person of mass 100 kg reaches a height in 10 seconds. Find the power used by the person (g=10 ms2).
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In a simple Pendulum the displacement is equal to amplitude. Then kinetic energy will be
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1kWh equal to
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Which of the following graphs shows correct relation of kinetic energy (E), potential Energy (U) and height (h) from the ground of a particle?
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A rod of length l and mass m fixed at one end, is hanging vertically. The other end is now raised so that the rod makes an angle 30° with horizontal line. The work done in the process will be :
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How fast should a man weighing 600 N run to achieve a kinetic energy of 750 J. Take g=10 m s-2.
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Which of the following graphs best represent the graphical relationship between Kinetic Energy (K.E) and momentum (P) of a body in motion?
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Commercial unit of electrical energy one kilowatt hr. (1 kWh) is equivalent to:
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Flying birds has
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The temperature of the water at the bottom of a water fall is higher than that of the water at the top, because :
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Spring constant of a spring is K = 6 ×103 N/m. Work done to stretch it 10-2 m from mean position is
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An object of mass 15kg is moving with uniform velocity of 4m/s. What is the kinetic energy possessed by the object?
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A pump on the ground floor of a building can pump up water to fill the tank of 30 m3 in 15 min. If the tank is 40 m above the ground, and the efficiency of the pump is 30%, the power consumed by the pump is g=10 m/s2
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The work done to increase the velocity of a car from 30 km h-1 to 60 km h-1, if the mass of the car is 1500 kg, is:
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The practical unit of electrical energy 1 kWh means
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Which of the following term does not represent electric power (P) in electric circuit ?
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Which of the following terms does not represent electrical power in a circuit ?
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Heat and work done by the heat was discovered by
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A force of 40 N acts on a body, and body moves through a distance of 2 metre at an angle of 45° in the direction of the force. The work done by the force is 
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In any physical or chemical process, the total energy: