Why does ice float on water?

Important Questions on Gravitation

EASY

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 3 - Gravitation>Exercise>Q 17

What is the relationship between the buoyant force on an object and the liquid displaced by it?

MEDIUM

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 3 - Gravitation>Exercise>Q 18

What is the relation between true weight, apparent weight and the buoyant force?

MEDIUM

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 3 - Gravitation>Exercise>Q 19

The mass of a block made of certain material is $13.5 \mathrm{k}\mathrm{g}$ and its volume is $15\times {10}^{-3} {\mathrm{m}}^3$. Will the block float or sink in water? Give a reason for your answer.

MEDIUM

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 3 - Gravitation>Exercise>Q 20

Lead has greater density than iron and both are denser than water. Is the buoyant force on a lead object greater than, less than or equal to the buoyant force on an iron object of the same volume?

MEDIUM

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 3 - Gravitation>Exercise>Q 21

Why do you feel lighter when you swim?

EASY

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 3 - Gravitation>Exercise>Q 22

Why is bucket of water lighter when in water than when it is taken out of water?

MEDIUM

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 3 - Gravitation>Exercise>Q 23

Why is it easier to swim in seawater than in river water?

MEDIUM

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 3 - Gravitation>Exercise>Q 24

Two different objects are completely immersed in water and undergo same loss in weight. Is it necessary that the weights of these objects in air be also the same?