1. A man is walking with a suitcase held in his hand.
a. Why is no work done on the suitcase if the man is walking on a horizontal platform?
b. Why is work said to be done if the man is climbing a staircase?
Answers
Answered by
23
Explanation:
man is moving in a horizontal Road while holding the suitcase is doing no working is gravity but while climbing the stairs is doing work against gravity this is the answer
Answered by
33
Explanation: a. Because we know that There is no work done if the direction of the applied force and the displacement are at right angles (90°) to each other. Nd in this situation thus is happening.
b.When a person climbs the stairs of an office or a house, work is said to be done as he is moving against the force of gravity. ... Therefore, Work is measured by the product of force and displacement of the body along the direction of force.Hope it helps...mark as brainiest
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