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Physics
A moving object of mass 30 kg has 60 J of kinetic energy. What is its speed?
Chapter: [2] Work, Energy and Power
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What type of energy is possessed by a flowing water?
Chapter: [2] Work, Energy and Power
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If the speed of a particle is increased four times, how will its kinetic energy be affected?
Chapter: [2] Work, Energy and Power
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A body is thrown vertically upwards. Its velocity keeps on changing. What happens to its K.E. when does its velocity become zero?
Chapter: [2] Work, Energy and Power
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What change should be effected in the velocity of a body to maintain the same K.E., if its mass is increased four times?
Chapter: [2] Work, Energy and Power
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The K.E. of a body is 5 J. What will be its K.E. when its speed is doubled?
Chapter: [2] Work, Energy and Power
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Name the parameters that can change the K.E.
Chapter: [2] Work, Energy and Power
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Give an example of a body possessing no K.E.
Chapter: [2] Work, Energy and Power
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Define potential energy.
Chapter: [2] Work, Energy and Power
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What are the factors on which P.E. of a body depends?
Chapter: [2] Work, Energy and Power
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What is the amount of energy spent in lifting 1 kg through 1 m? Take g = 10 ms-2.
Chapter: [2] Work, Energy and Power
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Give two examples of P.E.
Chapter: [2] Work, Energy and Power
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What is the P.E. of a body lying on the surface of the earth?
Chapter: [2] Work, Energy and Power
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What is the amount of energy spent by the heart in pumping blood through the body?
Chapter: [2] Work, Energy and Power
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Name the type of energy possessed by a body due to a change in configuration.
Chapter: [2] Work, Energy and Power
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How is energy stored in a clock?
Chapter: [2] Work, Energy and Power
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Is P.E. a vector or a scalar quantity?
Chapter: [2] Work, Energy and Power
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Name the type of energy possessed by a
(i) stretched catapult (ii) hot iron
(iii) wound up clock
Chapter: [2] Work, Energy and Power
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An object is dropped from a height H. when is its
(i) P.E. maximum,
(ii) K.E. maximum,
(iii) P.E. = K.E.?
Chapter: [2] Work, Energy and Power
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A cricket ball is thrown up from the earth's surface. What happens to its P.E.
(a) during the motion
(b) at the highest point?
Chapter: [2] Work, Energy and Power
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