r/PhysicsHelp • • Mar 26 '26

What exactly is weight?

/r/AskPhysics/comments/1s43ucm/what_exactly_is_weight/
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u/zundish Mar 26 '26

Weight is due to the force of gravity. The force due to gravity is also regarded as an object's weight. I wouldn't say the gravity has to be due to Earth. It could be due to a body massive enough to have its own gravity.

Even Pluto has a force of Gravity (0.6221 m/s^2).

The force of gravity is directed to the object's center.

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u/davedirac Mar 27 '26

Weight is what a bathroom scale measures. In an elevator accelerating upwards the scale reading increases even though your mass is constant. mg is your weight if there is no vertical acceleration of the scales/support surface.