Embibe Experts Solutions for Chapter: Gravitation, Exercise 1: JKCET 2019

The force of attraction between two Lead balls, of radius $10 \mathrm{cm}$ and $1 \mathrm{cm}$ that are placed with their centres 1 metre apart is (The density of Lead is $5.51\times {10}^3 \mathrm{kg}/{\mathrm{m}}^3$)

The value of acceleration due to gravity is

The earth's mass is $80$ times that of moon and their diameters are $1600 \mathrm{km}$ and $800 \mathrm{km}$, respectively. If $g$ is the value of acceleration due to gravity on earth, what is its value on moon?

Two planets are at distances $R_1$ and $R_2$ from the Sun. Their periods are $T_1$ and $T_2$. ${\left(T_1/T_2\right)}^2$ is equal to

The velocity of escape on a planet whose radius is $1.7\times {10}^6 \mathrm{m}$ and acceleration due to gravity is $1.7 \mathrm{m}/{\mathrm{s}}^2$ is

What is the reason for earth NOT moving towards the moon, even though moon attracts the earth?