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Q:

# How does gravity affect weight?

A:

Gravity affects weight because gravity creates weight. Objects have mass, which is defined as how much matter an object contains. Weight is defined as the pull of gravity on mass.

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The relation between weight and gravitational pull is such that, when on another celestial body, the difference in gravity would alter a person's weight. The Earth's moon, for example, has a gravitational field that is 0.165 times the pull on earth. A person who weighs 170 pounds on Earth would only weigh 28.05 pounds on the moon. This is why during the moon landing videos, people on earth viewed the astronauts taking large, bounding steps. With very little weight, it was easy for them to push off the ground.

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## Related Questions

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According to the Science Channel, a heavier car moves at a slower rate of speed. To increase the speed of a heavy vehicle requires more force to move the car faster, using more fuel. A recommended way to reduce the weight of a vehicle and increase the car's fuel efficiency is to reduce the amount of weight by substituting lightweight car components, such as replacing steel with carbon fiber.

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Weight affects friction in that friction is directly proportional to the weight of the load one is moving. If one doubles the load being moved, friction increases by a factor of two.

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Objects fall at the same velocity regardless of their weight, if gravity is the only force acting upon them. In a vacuum, where air resistance has been eliminated, a bowling ball and a feather fall at the same speed.