1) In smooth surface, the friction is ____ a) less b) more 2) The amount of friction depends on the _____ from which the two surfaces are made a) air b) weight c) material 3) Which shape is easy for the vehicles to move easily through the air a) square b) streamlined c) rectangle 4) ______produces when we rub our hands a) cold b) heat c) none of the above 5) when we apply brake in a moving car, it stops due to the _____ between the road the tyre a) gravitational force b) frictional force c) magnetic force

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