## Problem Statement

**Calculate the force of gravitation
between two objects of masses 50 kg and 120 kg respectively kept at a distance
of 10 m from one another. (Gravitational constant, G = 6.7 × **10

^{-11}

**Nm2 /kg^2)**

## Solution

** **M1 = 50 kg

M2 = 120 kg

Distance = r = 10 m

Force of gravitation

= (G M1 M2) / r^{2}

F= (6.7 x 10 ^{-11} ) (50 x 120) / 10 ^{2}

So, F = 4.02 x 10^{-9} N

Question Set – Physics Problems for grade 9

Solution to problems – class 9 – Set 1 Q34