Q-6 What are the differences between the mass of an object and its weight?
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The mass of an object is a measure of the object's inertial property, or the amount of matter it contains. The weight of an object is a measure of the force exerted on the object by gravity, or the force needed to support it. The pull of gravity on the earth gives an object a downward acceleration of about 9.8 m/s2.
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Mass
- Mass of an object is the amount of matter contained in an object/body.
- Mass is an independent quantity.
- Mass of an object is constant everywhere in the universe.
- Mass is a scalar quantity.
- Mass is often denoted by 'M'.
- SI unit of mass is Kilogram.
- Mass can be measured by beam balance.
- Mass of an object can be obtained by taking the products of Volume and Density of the object.
- Mass = Volume × Density or M = V × d
Weight
- Weight of an object is the amount of force acting on a mass due to acceleration due to gravity.
- Weight is a dependent quantity.
- Weight of an object varies with variation in acceleration due to gravity.
- Weight is a vector quantity.
- It is denoted by 'W'.
- SI unit of weight is Newton(N).
- Weight is often measured using spring balance.
- Weight of an object is obtained by taking the products of mass and acceleration due to gravity.
- Weight = mass × acceleration due to gravity or W = m × g.
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