Question

15.1 Does the water stored in a dam possess potential energy? Justify your answer.
15.2 Define potential energy and state its Sl unit.
15.3 List two examples where an object possesses potential energy.
15.4 Explain what is gravitational potential energy using an example.​

Answer 1

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Does the water stored in a dam possess potential energy? Justify your answer.

Answer :-

The water behind a hydroelectric dam stores gravitational potential energy since it is at a higher level than the water on the other side of the dam. As the water falls, this potential energy is converted into kinetic energy, which turns turbines to generate electricity.

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Define potential energy and state its Sl unit.

Answer:-

The energy possessed by a body due to its state of rest or position is called potential energy. it's S.I unit is joule.

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List two examples where an object possesses potential energy.

Answer:-

Water stored in a reservoir high up in the dams and a raised hammer , a stretched rubber sling of a catapult all possess POTENTIAL ENERGY.

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Explain what is gravitational potential energy using an example.

Answer:-

A weight lifted vertically to acquire gravitational potential energy. A weight lifted vertically to acquire gravitational potential energy. If the force were to be removed, the object would fall back down to the ground and the gravitational potential energy would be transferred to kinetic energy of the falling object.

Answer 2

Answer:

15.1: yes, The water behind a hydroelectric dam stores gravitational potential energy. Because the water in the dam is higher than the water on the other side of the dam. As the water comes down, this potential energy is transformed into kinetic energy, which turns turbines to generate electricity.

15.2: The energy held by a body due to its state of rest or position is called potential energy. The S.I unit of potential energy is the joule.

15.3: Car parked at the top of the hill & Water behind the dam

15.4: The energy stored in an object due to its position above the Earth's surface is called gravitational potential energy. This energy is due to the force of gravity acting on an object.

Ep=mgh

For example, When a stone falls from a height then potential energy is converted to kinetic energy when it comes on the surface of the earth.

Explanation: