Mansi Garg and Jitendra Kumar Solutions for Chapter: Gravitation, Exercise 3: CHAPTER EXERCISE

There are two kinds of balance that is beam balance and a spring balance. If both balances give the same measure of a given body on the surface of the Earth, will they give same measure on the surface of moon? Explain your answer.

Derive an expression for force of attraction between two bodies.

The Earth is acted upon by gravitation of Sun even, then it does not fall into the sun. Why?

Find the acceleration due to gravity on Mars surface, using data given below (take the mass of Mars $= 6.4 \times {10}^{23} \mathrm{kg}$ and take the radius of Mars $= 3.4 \times {10}^6 \mathrm{m}$)

In a hypothetical case, if the diameter of the earth becomes a double of its present value and mass becomes eight times of present value, then find the value of acceleration due to gravity.  

A car falls off an edge and drops a floor in $10 \mathrm{s}$. Find the speed of striking the ground (take $g=10 \mathrm{m}/{\mathrm{s}}^2$). 

A car falls off a ledge and drops a floor in $10 \mathrm{s}$. Find Average speed. (Take $g = 10 \mathrm{m}/{\mathrm{s}}^2$). 

Suppose the mass of sun is reduced to $20\%$, how it affects the Earth? Show numerically.