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On the planet Zorag, Angel drops a 5 Kg rock from a space shuttle hovering 10 meters high. The rock does 300 N*M of work on the way down. What is the acceleration due to gravity on planet Zorag?

Sagot :

AL2006idn

The work done in bringing the rock from the ship to the ground is
the potential energy it has before Angel drops it.

         Potential energy = (mass) x (gravity) x (height)

You have said that this amounts to  300 N-m .

                                       300 N-m    = (5 kg) x (gravity) x (10 m)

Divide each side by  10m :      30 N = (5 kg) x (gravity)

Divide each side by  5 kg :    6 N/kg = 6 m/s² = gravity

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By the way ...  The rock doesn't do the work on the way down. Gravity does it !


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