Question

Plz answer asap!!
Give 5 HOT questions on the derivation of kinetic and potential energy. Plz answer fast I need it now.
Ur reference: Class 9 Physics
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Answer 1

Here are some questions about the topic --

1. Write an expression for the work done in lifting a body of mass ‘m’ through a vertical height ‘h’.

2. What will cause greater change in kinetic energy of a body? Changing its mass or changing its velocity ?

3. A pair of bullocks exert a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field ?

4. Is it possible that some force is acting on a body but still the work done is zero ?

5. What is the work done when the force acting on the body and the displacement produced in the body are at right angles to each other ?

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Answer 2

Explanation:

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(1) G remains the same but g changes