Q. A girl accidently dropped a stone from her building, the mass os the stone is 12 g and the height is 60 m. If the air resistance can be neglected and g = 10 N kg⁻¹, what is the speed of the stone when it hits the ground?

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Q. The SI unit of work is

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Q. When a body of mass m moves at a speed v, its kinetic energy is defined as

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Q. The product of the force and the distance moved by the object in the direction of the force is known as

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Q. A roller coaster is a common example of a body having

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Q. The mechanical energy that a body have are of

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Q. When the force is applied to the object but the object does not move, it means that

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Q. The work done by a force of one newton which moves an object through a distance of one meter in the direction of the force is known as

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Q. Kinetic energy does not exist in a

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Q. In symbols, 1 J is equal to

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Q. If F is the constant force and s is the distance moved by the object in the direction of the force, then the work done by a constant force W is calculated by

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Q. If Ep is the gravitational potential energy, m is the mass, g is the gravitational field strength and h is the height then, Gravitational potential energy is defined as

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Q. The distance moved in the direction of force F is always

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Q. For 2 objects of the same mass moving at different speeds, the faster objects has

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Q. When a force moves an object, it does work and the object gains

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Q. No work is done when the direction of the applied force and the direction in which the object moves are

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Q. John pushed a trolley in a departmental store, he exerted 20 N force to a 3 m distance. The work done by him is

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Q. A moving object has

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Q. Gravitational potential energy is the energy a body has due to its

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