Friction is a..., Contact force, Non contact force, Either contact or non contact, Neither contact nor non contact, Friction always..., Increases motion, Decreases motion, Either increases or decreases, None of these, We can increase or decrease friction., True, False, We cannot walk without friction., True, False, Friction is always harmful., True, False, Which of the following is not a smooth surface?, surface of a wet soap, surface of tires, glazed tiles, surface of a mirror, We use grease and lubricants to..., Increase friction, Decrease friction, Either increase or decrease friction, None of these, When we step on a banana peel, we slip because of..., More friction, Less friction, muscular force, Electrostatic force, A rolling ball stops after sometime, it is due to..., Gravitation force, Frictional force, Electrostatic force, None of these, There is no frictional force in outer space., True, False.

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