Embibe Experts Solutions for Exercise 3: EXERCISE 7.3

Two spherical bodies having masses $M$ and $3M$, and radii $r$ and $4r$ respectively are released in free space from rest such that the initial separation between their centres is $13r$. If only force is gravitational attraction, the distance covered by the smaller body just before collision is

If $g$ is the acceleration due to gravity on the surface of the earth, the gain in potential energy of an object of mass $m$ raised from the earths surface to a height equal to the radius $R$ of the earth is

Let $V$ and $E$ represent gravitational potential and gravitational field strength at a distance $r$ from the centre of a hollow sphere. Consider the following statements

Two objects of masses $\mathrm{m}$ and $2 \mathrm{m}$ are at rest at infinite separation. They move towards each other under mutual gravitational attraction then at a separation $r$, which of the following is true?

Given that mass of the earth is $M$ and its radius is $R.$ A body is dropped from a height equal to the radius of the earth above the surface of the earth. When it reaches the ground, its speed will be

Two bodies of masses $M$ and $4M$ Are placed at a distance $r$. The gravitational potential at a point on the line joining them where the gravitational field is zero is.