EASY
9th CBSE
IMPORTANT
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The relative density of zinc metal is 4.2. Its density in SI system is:

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Important Questions on Gravitation

EASY
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 21
Density of mercury is 136000 kg m-3. Its relative density is:
MEDIUM
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 1

What do you understand by the following terms?

(a) Upthrust  (b) Buoyancy

EASY
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 2
State the factors which are responsible for the buoyant force.
EASY
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 3
State Archimedes’ principle?
MEDIUM
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 1

State whether upthrust will increase or decrease, if:

(a) the volume of solid increases.

(b) the density of a liquid in which the solid floats decrease.

EASY
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 3
What do you understand by the term relative density? State its units.
HARD
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 1
How can you verify Archimedes’ principle by using a spring balance and an overflow jar?
MEDIUM
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q (a)
A cube of side 5 cm is immersed in water and then in the saturated salt solution. In which case will it experience a greater buoyant force? If each side of the cube is reduced to 4 cm and then immersed in water, what will be the effect on the buoyant force experienced by the cube as compared to the first case for water? Give reason for each case.