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Class 8

Factors affecting friction

Last Updated on July 3, 2023 By Mrs Shilpi Nagpal

Surfaces are pressed

Question 1 On what factors does the friction depends? Question 2 Which will cause more friction: a rough surface or smooth surface? Question 3 Ramesh has to push a lighter box and Seema has to push a similar heavy box on the same floor. Who will have to apply a larger force and why? Question 4 Give an example to show that friction depends on the nature of two … [Read more...] about Factors affecting friction

Pressure Exerted by Gases

Last Updated on July 3, 2023 By Mrs Shilpi Nagpal

Question 1 Why makes a balloon get inflated when air is filled in it? Question 2 Why a bicycle tube get inflated when air is filled in it? All the gases exert pressure on the walls of the container. (1) Air is a mixture of gases. (2) All the gases are made up of tiny particles called molecules which move around quickly in all directions. (3) The fast moving gas … [Read more...] about Pressure Exerted by Gases

Cause of Friction

Last Updated on July 3, 2023 By Mrs Shilpi Nagpal

spring balance

Question 1 Which type of surface produce least friction? Question 2 Which type of surface produce too much friction? Question 3 Name a device which is used to measure force acting on an object? Question 4 What is a spring balance? Question 5 Which will cause more friction: A rough surface or a smooth surface? Why? Question 6 What is meant by irregularities of … [Read more...] about Cause of Friction

Friction

Last Updated on July 3, 2023 By Mrs Shilpi Nagpal

Question 1 Name the force which always opposes motion? Question 2 What is the direction of force of friction acting on moving object? Question 3 Define the term friction? Question 4 When we try to push a heavy box kept on ground it does not move at all. Which force is preventing this box to move forward. Where does this force acts? Question 5 A ball moving on the … [Read more...] about Friction

Applications of Atmospheric Pressure

Last Updated on July 3, 2023 By Mrs Shilpi Nagpal

Question 1What type of pressure is involved in the filling of a liquid in a syringe? Question 2 What is a rubber sucker? Question 3 How does a rubber sucker works? Question 4 State few uses of rubber sucker? Question 5 How does a syringe work? Question 6 What is a syringe? Question 7 How does a dropper work? Question 8 What is a dropper? (1) Drinking … [Read more...] about Applications of Atmospheric Pressure

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