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A 5 kg box slides down a ramp a distance of two meters before it reaches the ground. The ramp has an angle of 30°. What is the work done by gravity on the box?

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Important Questions on Work, Power and Energy

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98000 joule of energy was spent to raise a mass of 80 kg. The mass was raised to a height of _____.
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"Energy can neither be created nor be destroyed", which law is this?
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One kilowatt hour is unit of _____.
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A porter lifts the luggage weighing 5 kg from the ground and puts on the head. Then, he stands still for some time. How much work he is doing while holding the luggage on his head and standing still?
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When a body falls freely, _____.
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A body having mass 2 kg is dropped from a height 10 m. When it reaches on earth, its kinetic energy will be?(g = 9.8 m/s).
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A body of 2 kg is moving on a smooth horizontal surface with a velocity of 10 m/s in the east direction. A constant force of 10 N is acting on the body in the north direction; after 2 seconds the final velocity will be:
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A heater coil connected to a supply of a 220 V is dissipating some power \( P_1 \) . The coil is cut into half and the two halves are connected in parallel. The heater now dissipates a power \( P_2 \). Find the ratio of power \( P_1 \) : \( P_2 \).

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When a coil spring is compressed, the work is done on the spring. The elastic potential energy .....
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Which of the following is not the unit of work?

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How much work is done to lift a 4 kg block to a point 2m above its resting location? (g = 9.8 m/s2)
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The work done will be zero if the angle between the force and distance is .....
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Which of the following statement(s) is/are correct regarding work?

A. Work is the force applied over a distance. 

B. Examples of work include lifting an object against the Earth's gravitation.

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When a body is moving on a horizontal surface, work done by the gravity( gravitational force) is _____.
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What should the angle be between force F and displacement S in order for work done to be zero?