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8th CBSE
IMPORTANT
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Ball bearings reduce friction by replacing sliding friction with friction.

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Important Questions on Friction

EASY
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 12 - Friction>Exercises>Q B
A shape that is slightly rounded in front and narrower at the back is called a _____ shape. (circular, streamlined, aerodynamic)
EASY
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 12 - Friction>Exercises>Q C
Friction is a contact force.
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8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 12 - Friction>Exercises>Q C
Friction is greater when there are fewer irregularities on a surface.
MEDIUM
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 12 - Friction>Exercises>Q C
Friction is greater when an object is stationary on a surface than when it is moving over it.
EASY
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 12 - Friction>Exercises>Q C
Rolling friction is less than static friction.
EASY
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 12 - Friction>Exercises>Q C
Energy is wasted in overcoming friction.
EASY
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 12 - Friction>Exercises>Q C
It is desirable to increase friction in the brakes of vehicles.
EASY
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 12 - Friction>Exercises>Q C
Streamlining a shape reduces drag due to air or water.