Embibe Experts Solutions for Exercise 2: EXERCISE 7.2

If the earth stops rotating about its axis, the acceleration due to gravity will remain unchanged at _____. 

A rocket is fired from the earth's surface to the moon's surface. The distance between the centre's of earth and the moon is $r$ and the mass of the earth is $81$ times the mass of the moon. The gravitational force on the rocket will be zero, when its distance from the moon is 

Infinite number of masses, each of mass $m$, are placed along a straight line at distances $r\text{,} 2r\text{,} 4r\text{,} 8r$ etc. from a reference point $O$. The gravitational field at $O$ will be

The gravitational field in a region is given by $\overrightarrow{E}=\left(5\hat{i}+12\hat{j}\right) \mathrm{N} {\mathrm{kg}}^{-1}$, then the magnitude of the gravitational force acting on a particle of mass $2\mathrm{kg}$ placed at the origin, will be

A spherical shell of mass $M$, inner radius $R_1$ and outer radius $R_2$ is shown in the figure. The variation of magnitude of gravitational field intensity as a function of radial distance $r$ from the centre of the sphere is best represented by

Two spherical shells each of mass $m$ but radii are $R$ and $\frac{R}{2}$ are placed in such a way that the distance between centres is $\frac{3R}{2}$ as shown in figure. The gravitational force between them