EASY
9th CBSE
IMPORTANT
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What are the units of weight in SI system? 

Important Questions on Gravitation

EASY
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 2
Is weight a scalar or a vector quantity? 
MEDIUM
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 2
How does the weight of a body gets affected, if the body is taken far away from the earth? Explain your answer. 
MEDIUM
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 3
What is the source of centripetal force that a planet requires to revolve around the Sun? On what factors does that force depend?  
HARD
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 4

On the earth, a stone is thrown from a height in a direction parallel to the earth’s surface while another stone is simultaneously dropped from the same height. Which stone would reach the ground first and why?

MEDIUM
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 5
Identical packets are dropped from two aeroplanes, one above the equator and the other above the North Pole, both at height h. Assuming all conditions are identical, will those packets take same time to reach the surface of the earth. Justify your answer?
HARD
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 6

The weight of any person on the moon is about 16  times that on the earth. He can lift a mass of 15 kg on the earth. What will be the maximum mass, which can be lifted by the same force applied by the person on the moon?

HARD
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 7
Calculate the average density of the earth in terms of g, G and R.
HARD
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 1
How does the weight of an object vary with respect to mass and radius of the earth. In a hypothetical case, if the diameter of the earth becomes half of its present value and its mass becomes four times of its present value, then how would the weight of any object on the surface of the earth be affected.