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Explanation:
Potential energy is often associated with restoring forces such as a spring or the force of gravity. The action of stretching the spring or lifting the mass of an object is performed by an external force that works against the force field of the potential. This work is stored in the force field as potential energy. If the external force is removed the force field acts on the body to perform the work as it moves the body back to its initial position, reducing the stretch of the spring or causing the body to fall. The more formal definition is that potential energy is the energy difference between the energy of an object in a given position and its energy at a reference position.
From this incident, when water rises from the well to tank, Energy changes from Kinetic to Potential Energy when water is stored fully in Tank, the total energy is wholly Potential (P.E = mgh) 'h' is the high from the ground level.
i) From the tank to the tap, the energy changes from potential to kinetic energy.
Here kinetic energy K.E = 1/2 mv² 'v' is the speed of water. At the tap, P.E = 0
ii) Yes. Ruvanjani wastes more water for washing hands and legs for a little job. wasting water is not good habit . even a drop is precious. So we must use water only for essential needs.
iii) At the Top (Tank)
P.E = mgh, K.E = 0, T.E = P.E
At the Middle
P.E ≠ 0, K.E ≠ 0
T.E = P.E + K.E
Near the tap (bottom)
P.E = 0, K.E ≠ 0
T.E = K.E
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