Work, Energy and Power

Related Questions

• A body of mass 10 kg is dropped to the ground from a height of 10 metres. The work done by the gravitational force is $(g = 9.8\,m/{\sec ^2})$

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• A car travelling at a speed of 30 km/hour is brought to a halt in 8 m by applying brakes. If the same car is travelling at 60 km/hour, it can be brought to a halt with the same braking force in

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• A position dependent force $F = 7 - 2x + 3{x^2}\,newton$ acts on a small body of mass 2 kg and displaces it from $x = 0$ to $x = 5\,m$. The work done in joules is

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• A man starts walking from a point on the surface of earth (assumed smooth) and reaches diagonally opposite point. What is the work done by him

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• A running man has half the kinetic energy of that of a boy of half of his mass. The man speeds up by 1m/s so as to have same K.E. as that of the boy. The original speed of the man will be

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