The mass of an object is 20 kg. What will be its weight on the earth (take \(g = 10\,ms^{-2}\))?
200 N
Weight is the gravitational force exerted on a body and is given by the relation \(W = mg\), where \(m\) is the mass in kilograms and \(g\) is the acceleration due to gravity.
Substituting, \(W = 20 \times 10 = 200\) newtons. Weight is a force and so its SI unit is the newton, not kilogram (unit of mass), watt (unit of power) or pascal (unit of pressure). Hence, 200 N.
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