Question

" when a body is dropped from a heigth, it falls with an acceleration of 10 m/s 2.If its mass is 250 g , how much force is exerted on it downward? Who exerts this force on the body? "

Answer 1

Given that the body of mass 'm' falls with an acceleration of $10m{s}^{-2}$ ,i.e., g, then the net force acting on it will be the weight of the body:

$$\begin{gathered} F=m\times a \\ herea=10m{s}^{-2} \\ therefore,F=0.25\times 10 \\ F=2.5N \end{gathered}$$

The force exerted on the body is due to the gravitational pull of the earth.