EASY
9th CBSE
IMPORTANT
Earn 100

Can a body have mass but no weight?

Important Questions on Gravitation

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 3 - Gravitation>Exercises>Q B
You buy a bag of sugar of weight W at a place near the equator. You take this bag to Antarctica (near the poles). Would its weight be the same there? If not, would it increase or decrease?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 3 - Gravitation>Exercises>Q B
Two equal masses separated by a certain distance experience a force F. If the masses are doubled, then find the change in separation required to maintain the same force.
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 3 - Gravitation>Exercises>Q C
If the density of two planets is the same, but their radii are in the ratio of 1:2, prove that the ratio of accelerations due to gravity on their surfaces is also 1:2.
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 3 - Gravitation>Exercises>Q C
The earth attracts an apple. Does the apple also attract the earth? If it does, why does the earth not move towards the apple?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 3 - Gravitation>Exercises>Q C
Suppose the mass of the earth somehow increases by 10% without any change in its size. What would happen to your weight? How would your weight change if the radius of the earth becomes twice its present value without any change in its mass?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 3 - Gravitation>Exercises>Q D
State Newton's law of gravitation. Using this law, find the acceleration due to gravity on the surface of the earth.
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 3 - Gravitation>Exercises>Q D

Derive the expression for acceleration due to gravity. How does it vary with height?

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 3 - Gravitation>Exercises>Q D
Derive the expression for acceleration due to gravity. How does it vary as we move from equator to the poles?