EASY
9th CBSE
IMPORTANT
Earn 100

In the relation , the quantity :
(a)depend on the value of g on the place of observation
(b)is used only when the earth is one of the two masses
(c)is the greatest on the surface of the earth
(d)is of the same value irrespective of the place of the observation

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Important Questions on Gravitation
EASY
9th CBSE
IMPORTANT
The gravitational force of attraction between two objects is . Keeping the masses of the object unchanged, if the distance between the objects is halved, then the magnitude of gravitational force will become.

MEDIUM
9th CBSE
IMPORTANT
An apple of mass falls from a tree because of gravitational attraction between Earth and the apple. If the magnitude of the force exerted by the earth on the apple be and the magnitude of force exerted by the apple on the earth be , then

EASY
9th CBSE
IMPORTANT
According to one of the Kepler's law of planetary motion

MEDIUM
9th CBSE
IMPORTANT
If the distance between two masses is increased by , by what factor would the mass of one of them, have to be altered to maintain the same gravitational force? Would this be an increase or decrease in mass

EASY
9th CBSE
IMPORTANT
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?

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?
