1.

A mass m on the surface of the Earth is shifted to atarget equal to the radius of the Earth. If R is the radius and M is the mass of the Earth, then work done in this process is

Answer»

`(mgR)/2`
mgR
2 mgR
`(mgR)/4`

Solution :`U_(E)=(-GMm)/R`
`U_(T)=(-GMm)/(2R)`
`W=U_(T)-U_(E)=(-GMm)/(2R)+(GMm)/R`
= `(GMm)/(2R)=(GR^(2)m)/(2R)=(mgR)/2`


Discussion

No Comment Found

Related InterviewSolutions