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3 June, 08:52

What is the new weight of a 10kg object on a planet that has twice the earths mass. (assume that the radius of the planet is the same as earths)

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  1. 3 June, 10:31
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    Weight = (mass) x (acceleration of gravity).

    Acceleration of gravity on a planet's surface is proportional to

    (planet's mass) / (planet's radius) ².

    On Earth's surface, acceleration of gravity is 9.8 m/s².

    Weight of 10 kg mass = (10 kg) x (9.8 m/s²) = 98 newtons.

    On the surface of a planet with twice the Earth's mass

    all stuffed into the same radius, the acceleration of gravity

    would be 19.6 m/s² ... double what it is on Earth.

    Weight of 10 kg would be (10 kg) x (19.6 m/s²) = 196 newtons ...

    double its Earth weight.
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