Question

# What is mass, and how does it differ from weight?

Solution

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Let us first check the definitions of mass and weight respectively.

mass $(m)$: it is the amount of matter an object contains. The unit is $\mathrm{lb}$, and usually written as $m$.

Weight $(W)$: is the amount of the gravitational force felt by an object or exerted on an object. The SI unit is $\mathrm{N}$ and expressed in $mg$.

$W=mg,$

Hence,

$\text{weight}=\text{mass}\times \text{Earth's gravitational acceleration}.$

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