Mansi Garg and Jitendra Kumar Solutions for Chapter: Gravitation, Exercise 4: CHALLENGERS

The weight of a body is the force with which a body is attracted by the Earth towards its centre. What is the weight of an object at the point A shown in figure?

Two spheres of masses $100 \mathrm{kg}$ and $900 \mathrm{kg}$ each of radius $10 \mathrm{m}$ and $20 \mathrm{m}$ respectively, are touching each other, then the gravitational force acting between them is:

Consider the following diagrams.

If the gravitational force for system A is F, then what will be the gravitational force for system B?

A mass of $1 \mathrm{g}$ is separated from another mass of $1 \mathrm{g}$ by a distance of $1 \mathrm{cm}$. How many $\mathrm{g}-\mathrm{wt}$ of force exists between them?

Two bodies weighing $50 \mathrm{kg}$ and $10 \mathrm{kg}$ are kept at a distance $5 \mathrm{m}$ apart. If the distance between them is increased by $5 \mathrm{m}$, then the value of percentage change in force.

An apple falls from a tree because of gravitational force of attraction $F_1$ between the Earth and apple. If $F_2$ is the magnitude of force exerted by apple on the Earth, then :

If the diameter of Earth becomes two times of its present value and its mass remains unchanged, then how would the weight of an object on the surface of the Earth be affected?

If the radius of the Earth shrinks by $4\%$ and there is no change in its mass, then acceleration due to gravity, which depends on mass and radius will change. By how much does the value of $g$ change?