Question

2.Categorise the work done as positive, negative or zero in the following cases:
(a)A man carrying a suitcase in his hands climbs up the stairs.
(b)Work done by the force of gravity on a trolley rolling down a slope.
(c)A stone tied to a string and whirled around in a circular path.
(d)A porter carrying a heavy load on his head standing at a place.
(e)A sailboat moving in the direction of wind.

Answer 1

Answer:

a) negative work
b) 0 work

c) 0 work

d) 0 work

e) Positive work

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