What are 3 reasons why friction is needed?
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We can walk because of friction between surface and legs.
Vehicles move and stop because of the friction of the brakes and the tires.
Writing with pen requires friction and also rubbing with an eraser uses friction.
Airplanes can fly and move in the air because of friction in the air called drag or air resistance.
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- Friction is needed to walk on ground.
- Friction is used to light a matchstick.
- Road transport is possible by friction.
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