Question

The gravitational force which acts on a body of mass 1 kg on the surface of the earth is

• A. 9.8 N
• B. $\frac{1}{9.8}$ N
• C. 980 N
• D. $\frac{1}{980}$ N

Answer 1

The correct option is A 9.8 N

force due to gracity is given by $\frac{GMm}{r^2}=F$, here $\frac{GM}{r^2}$ represents acceleration due to gravity.

value of which is $9.81m/s^2$

and value of $m$ is given as $1kg$

so force acting on the body is $m.g=1\times 9.81=9.81N$

so answer is option A.