Question

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Answer 1

Answer:

1. When an object slows down, its final kinetic energy is less than its initial kinetic energy, the change in its kinetic energy is negative, and so is the net work done on it. The work-energy theorem says that this equals the change in kinetic energy.

2.

$kinetic \: \: energy \: = \frac{1}{2} m {v}^{2} \\ potential \: \: energy = mgh$

3. Potential energy is converted into kinetic energy.

4.in the above pic...

5. The principle of conservation of energy states that the total amount of energy remains the same in such conversions, i.e. energy cannot be created or destroyed. In mechanics, the potential energy possessed by a body is frequently converted into kinetic energy, and vice versa.

6. While energy is 'joules', power is 'joules per second'. Well, in another words Power is 'watt' and Energy is 'watt-hour'. Another difference is that energy can be stored whereas power cannot be stored. While energy comes with a time component. Power is an instantaneous quantity

7.in the above picture

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