Question

an object is taken up using upstair having 20 step each of height 20 cm and that flat width of 25 CM calculate work done against gravity if object is taken

(I) from first step to the last step.
(ii) the from ground to the last step.
(iii) from third step to the 15th step
(iv) if object is taken down from 18 step to the ninth step then how much work will be done by the force of gravity

given the mass of the body is 2kg and the gravitational acceleration at that place is 10 m/s^2
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Answer 1

Answer:

it is a question based on work energy and power.

Explanation:

Work = Force × Displacement

P=W/t

U=mgh