Q.

Why the tires of vehicles are treaded?        

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a

The force of friction is lower when treads are present.

b

The treads increase the friction between the tires and the road.

c

The treads decrease the friction between the tires and the road.

d

 The treads make the surface of the tire smooth.

answer is A.

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Detailed Solution

The tires of vehicles are treaded or grooved because the treads increase the grip or friction between the tires and the road to prevent the skidding of vehicles. These treads or grooves also allow water beneath the wheel to be expelled.

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