Question

A body of mass m has to be lifted by applied force to some height h . (a) What is the minimum force required for this purpose? (b) How much energy is transferred to the body?​

Answer 1

Answer:

Hey mate here is your answer...

Explanation:

The gravitational potential energy at a height h is

U

h

=

R

e

+h

−GM

e

m

If h=R

e

⇒U

h

=

+2R

e

−GM

e

m

=

2

−mgR

e

& the gravitational potential energy on the surface of earth is

U

s

=

R

e

−GM

e

m

So change in potential energy △U=U

h

−U

s

=

2R

e

−GM

e

m

+

R

e

GM

e

m

=

2R

e

GM

e

m

△U=

2

mgR

e

It means that to move a body of a mass m from the surface of earth to a height h=R

e

, the energy required is

2R

e

GM

e

m

=

2

mgR

e

Answer 2

Hiiieeeee...

Refer to the attachment ✌️