Match the correct answer: a. girl pulling a trolley with a roller (i)static friction b. boy pulling a trolley without roller (ii) fluid friction c. a child flying a paper plane (iii) rolling friction d. a man pushing a stationary box (iv) sliding friction

a. girl pulling a trolley with roller - (iii) rolling friction. Girl pulling a trolley with a roller is an example of rolling friction. Rolling friction is the resistive force that slows down the motion of a rolling object. For a moving object, rolling friction is less than the sliding friction. b. boy pulling a trolley without roller - (iv) sliding friction. Boy pulling a trolley without roller is an example of sliding friction. Sliding friction occurs when a body slides over a surface. Sliding friction is less than static friction. c. a child flying a paper plane - (ii) fluid friction. A child is flying a paper plane is an example of fluid friction. It is the friction offered by a fluid on the moving object. The frictional force offered by the fluid is also known as drag. d. a man pushing a stationary box - (i) static friction A man pushing a stationary box is an example of static friction. Static friction is the force that keeps the object at rest. a. girl pulling a trolley with roller (iii) rolling friction. b. boy pulling a trolley without roller (iv) sliding friction. c. a child flying a paper plane (ii) fluid friction. d. a man pushing a stationary box (i) static friction

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I Explore 3rd EDITION A Science Textbook 8>Chapter 10 - Friction>Check Point>Q 2

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8th CBSE

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Use of talcum powder on a carrom board increases friction.

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Important Questions on Friction

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8th CBSE

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I Explore 3rd EDITION A Science Textbook 8>Chapter 10 - Friction>Check Point>Q 1

Rolling friction can be more than static friction.

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8th CBSE

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I Explore 3rd EDITION A Science Textbook 8>Chapter 10 - Friction>Check Point>Q 1

It is easier to slide than rolling an empty cylinder.

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I Explore 3rd EDITION A Science Textbook 8>Chapter 10 - Friction>Check Point>Q 1

In a ball bearing, metallic balls are arranged in a ring form.

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I Explore 3rd EDITION A Science Textbook 8>Chapter 10 - Friction>Check Point>Q 2

Match the correct answer:

a. girl pulling a trolley with a roller	(i)static friction
b. boy pulling a trolley without roller	(ii) fluid friction
c. a child flying a paper plane	(iii) rolling friction
d. a man pushing a stationary box	(iv) sliding friction