Question

The gravitational potential difference between the surface of a planet and 10 m above is 5 J/kg. If the gravitational field is supposed to be uniform, the work done in moving a 2 kg mass from the surface of the planet to a height of 8 m is
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Answer 1

Answer:

A

2J

The potential difference for a distance of 20m is 2 joule/kg.

Now work done =m× potential difference.

Thus work done for a distance of 4m for a mass 5kg, W=

20

4

×2×5

⟹W=2J

Answer 2

Answer:

2J

Explanation:

I The potential difference for a distance of 20m is 2 joule/kg.

Now work done  =m× potential difference.

Thus work done for a distance of 4m for a mass 5kg,  W=204×2×5

⟹W=2J