Question

write an expression for work done in lifting a body of mass M through a vertical height H

Answer 1

heyyyy mate..

Here is your answer...

given , w= work done

and mass = m

and vertical height= H

and gravitational force= g

now by Question

W= mgh

hope it help you

Answer 2

The expression for work done in lifting a body of mass M through a vertical height H is mgH.

Explanation:

The work done by an object is given by the product of force and displacement. It is given by :

$W=F\times d$

F = force

d = displacement

When a body of mass M is lifted to a vertical height of H, the force acting on the body is force of gravity. This force is given by :

F = W = Mg

Work done is given by :

$W=M\times g\times H$

Hence, the expression for work done in lifting a body of mass M through a vertical height H is mgH. Hence, this is the required solution.

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