EASY
9th CBSE
IMPORTANT
Earn 100

Universal law of gravitation states that every object exerts a gravitational force of attraction on every other object. If this is true, why don't we notice such forces? Why don't the two objects in a room move towards each other due to this force?

Important Questions on Gravitation
EASY
9th CBSE
IMPORTANT
Suppose a planet whose mass and radius both are half those of the earth. Calculate the acceleration due to gravity on the surface of this planet.

MEDIUM
9th CBSE
IMPORTANT
A coin and a piece of paper are dropped simultaneously from the same height. Which of the two will touch the ground first? What will happen if the coin and the piece of paper are dropped in vacuum? Give reasons for your answer.

MEDIUM
9th CBSE
IMPORTANT
A stone and the earth attract each other with an equal and opposite force. Why then we see only the stone falling towards the earth but not the earth rising towards the stone?

MEDIUM
9th CBSE
IMPORTANT
What is the actual shape of the orbit of a planet around the sun? What assumption was made by Newton regarding shape of an orbit of a planet around the sun for deriving his inverse square rule from Kepler's third law of planetary motion?

EASY
9th CBSE
IMPORTANT
The value of at six distances , , , , and from the surface of the earth is found to be , , , and respectively.
Arrange these values of according to the increasing distances from the surface of the earth (keeping the value of nearest to the surface of the earth first).

MEDIUM
9th CBSE
IMPORTANT
The value of at six distances , , , , and from the surface of the earth are found to be , , , , , and respectively.
If the value of distance be from the surface of the earth, state whether this distance is deep inside or high up in the sky. Give reasons for your answer.

EASY
9th CBSE
IMPORTANT

EASY
9th CBSE
IMPORTANT
