Question

4. When is the work done by a force on a body said
to be negative? Give two examples.​

Answer 1

Answer:

+

Explanation:

Negative work: when the force acts in a direction opposite to the direction of displacement, work done is negative. Examples:

(i) When a body is lifted up, the work done by the gravitational force is negative. Gravitational force is acting downwards and weight is lifted up.

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Answer 2

Answer:

(ii) Negative work: when the force acts in a direction opposite to the direction of displacement, work done is negative. Examples: (i) When a body is lifted up, the work done by the gravitational force is negative. Gravitational force is acting downwards and weight is lifted up.

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