Question

distinguish between positive, negative and zero work done with
examples;

Answer 1

Answer:

Positive work done : work done is in the direction of force applied

Negative work done : work done is in the opposite of the force applied

Zero work done : work done is not been taken place

Explanation:

example:

+ve: pushing a car

-ve:rocket propulstion

0 :pushing a wall

Answer 2

*Work done is positive when the acceleration is positive.

Eg:when a bike increases its acceleration, then it is positive work done.

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*Work done is negative when the acceleration is negative

Eg:when बाइक reduces its acceleration.

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*When the object in which the force is applied is static. (the force appled has no effect on the object)

Eg:a static object.

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Hope it helps you

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