Question

If the mass of a body is 5kg , its weight on the surface of Earth would be..
Tke.g = 9.8 ms^-2


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Answer 1

Answer:

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The most common definition of weight is the force exerted on a body by gravity. This is often expressed in the formula W = mg, where W is the weight, m the mass of the object, and g gravitational acceleration, g=9.81 on surface of earth.

so if m=5kg then W=m.g=5×9.81=49.05N

so option A is correct.

Answer 2

Question :-

If the Mass of a Body is 5 kg, its Weight on the Surface of Earth would be -

(Take g = $9.8\:ms^{-2}$)

Solution :-

The Force of Attraction of the Earth on an Object is known as the Weight of the Object. It is Denoted by W.

The SI Unit of Weight is the same as that of Force, that is, Newton (N)

Mass, m = 5 kg

Acceleration due to Gravity, g = $\bold {9.8\:ms^{-2}}$

∴ $\boxed {\bold {Weight = Mass \times Acceleration\: due\: to\: Gravity}}$

Weight = $5\: kg \times 9.8\: ms^{-2} = \bold {49\: N}$

Thus, The Weight of the Body is 49 N . . .

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