Anyone answer question 8 plss....no Google pasted answer.... solve on paper friendz...no spam...plss.....
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Answer:
(a)zero(b) by gravity zero and by applied force is 5J
Explanation:
(a)
according to definition of work
work done by force is equal to force multiplied by displacement in the direction of force.
in case of satellites displacement is perpendicular to the direction of force at every point and there aren't any displacement in direction of force so work done by gravity is zero.
(b)
mass is on table and moving in horizontal direction and no any displacement in vertical direction.
force of gravity is vertical downward and there are zero displacement in vertical direction so
work done by gravity=0J
and work done by force 20N is
w=20×0.25=5J
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