A boy hold 4 kg school bag for 30 seconds, the work done by him will be in joule.
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Physics GK · all questionsWork, Energy and Power
Work, Energy and Power
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When a bullet is fired from a gun, its potential energy is converted into?
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A compressed spring has . . . . . . . . energy compared to a normal spring.
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Which of the following energy increases with speed?
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The work done by a force is equal to the
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By which the kinetic energy of an object increases-
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Linear momentum is equal to . . . . . . . .
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When a constant force acts on an object with a mass of 8 kg for a period of 3 seconds, it increases the velocity of the object from 4 ms-1 to 6 ms-1. What is the gravity of the force used?
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By the turbines flowing water and air are used for change in . . . . . . . .?
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The mass density of an object is defined as its . . . . . . . .
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When the force exerted on an object, then the work done will be zero if it has displacement.
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Mechanical energy is the sum of
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When two equal forces are acting on a body and in the opposite direction, the force acting on the body becomes . . . . . . . .
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A man jumped at a speed of 5 metre per second from a stationary boat and the boat moved off with the speed of 0.5 metre per second. How many times is the mass of the boat greater than that of the man?
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The example of non-conventional sources of energy is
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An object of mass 15kg is moving at the uniform velocity as 5m/s. Find the kinetic energy contained in an object?
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An object of 1kg is dropped to the ground from a height of 30m. What is the work done by the force of gravity? (g = 10 m/s2)
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A truck, a car and a motorcycle have equal kinetic energies. If equal, stopping forces are applied and they stop after travelling a distance of X, Y and Z respectively, then
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What is the kinetic energy of the bicycle having 10kg weight moving at a speed of 20m/s?
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Q100
Open questionEnergy that is produced commercially from coal is called
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