Hi I am stuck with this problem:(adsbygoogle = window.adsbygoogle || []).push({});

A deep hole in Earth reaches a depth of one half of Earth's radius. How much work is done when a 1-kg mass is slowly lifted from the bottom of the hole to Earth's surface?

I use the expression of the gravitation force, F=GMm/R3

so the work would be:

integral (F*(R/2)) from R=R/2 to R=R

I am not sure I am right so I need your input please.

Thank you

Brad

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# Homework Help: Gravitation deep hole physics problem

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