Sunil Batra Solutions for Chapter: Gravitation, Exercise 10: CHAPTER PRACTICE TEST 2

In the adjoining diagram shown
(a) Which one out of (i) and (ii) represents the weight of the box?
(b) If ${\mathrm{F}}_1=24 \mathrm{N}$ on the surface of the earth, what would its value be on the moon?
(c) Calculate the mass of an object if the weight of the object is $24 \mathrm{N}$ on the earth. ($g=10 \mathrm{m} {\mathrm{s}}^{-2}$).

Where is the acceleration due to gravity minimum and maximum on the surface of the earth?

State universal law of gravitation. Derive an expression for gravitational force between two bodies.

The weight of an object

A person weighs $W$ on the surface of the earth. The weight of the person at the centre of the earth will be:

What would be the least count of the spring balance used for measuring the force, of the range $0-1 \mathrm{kg} \mathrm{wt}$ and has total $100$ divisions on its scale?

A person can jump up to $5$ feet on the surface of the earth. On the surface of the moon, the same person can jump :

A student drops a ball from the top of a tower of height $19.6 \mathrm{m}$. The velocity with which the ball hits the ground is 
Take, $g=9.8 \mathrm{m}/{\mathrm{s}}^2$.