Question

when is the work done (1) positive(2) negative. give one example in each case​

Answer 1

Answer:

1) ball falling towards the ground

2) ball thrown upwards

Explanation:

1) work done is in the directoin of gravity

cos 0 is 1 (+ve)

2)work done is in the opp direction of gravity

cos 180 is -1 (-ve)

Answer 2

Answer:

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