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A space traveler whose mass is 115 kg leaves Earth.

(a) What are his weight and mass on Earth?

(b) What are his weight and mass in interplanetary space where there are no nearby planetary objects?

Answer :

The space traveler's mass and weight on the earth are 115 kg and 1127 N respectively. His weight and mass in interplanetary space are 115 kg and 0 N respectively.

Mass and weight are often confused, but mass is the amount of matter in a substance, while weight is the force exerted on a body due to the pull of gravity. A space traveler with a mass of 115 kg will have different weights and masses depending on the planet he is on and the gravitational pull that planet has.

Mass on Earth = 115 kg

Weight on Earth = mass on Earth * acceleration due to gravity (9.8 m/s²) = 115 kg * 9.8 m/s² = 1127 N

Mass is the same in all locations, and as a result, the space traveler's mass in interplanetary space is still 115 kg. The force of gravity is non-existent in interplanetary space. As a result, his weight would be zero if he were to stand on a weighing scale. As a result, there is no weight acting on the space traveler in interplanetary space where there are no nearby planetary objects.

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