Question

what will be the weight of a person on mars

Answer 1

The surface gravity on Mars is only about 38% of the surface Gravity on Earth, so if you weigh 100 pound on earth, you would weigh only 38 pound on Mars

Answer 2

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At just 0.376 of the Earth standard (or 0.376 g), a person who weighs 100 kg on Earth would weigh only 38 kg on Mars.