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# What is the difference between mass and weight?

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Weight is a measurement of the force placed on an object by gravity, whereas mass is the amount of matter an object contains. Mass is commonly denoted using m or M, and weight is denoted with W.

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Mass is commonly measured in grams and kilograms, whereas weight is generally measured in Newtons. Weight changes depending on location, while mass is always constant. For example, weight on the moon is less than weight on Earth. Weight is contingent on gravity; therefore, objects are heavier when gravity is greater. Gravity does no affect an astronaut's body in space, so the astronaut is essentially weightless. While the amount of mass can never reach zero, weight can equal zero.

## Related Questions

• A:

Mass has a direct effect on gravity, while weight is simply a measurement of the force of gravity on an object. While an object's mass stays the same no matter where it is located, the more mass an object has, the greater the gravitational pull is.

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In science, mass is the amount of matter an object has. Newton's second law says that mass is the property of matter that determines the force required to impart a given acceleration to an object.

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Mass, according to the University of Memphis, is the amount of matter in a given sample, while volume is the physical size of the sample. Mass and volume are two of the most important physical characteristics of matter when it comes to physics, and are used for measuring density.