Question

which shows that more friction is useful?
a. bowling lane
b. slide have smooth surface
c. heavy appliances have rollers
d. wheel of cars have rough​

Answer 1

Answer:

The answer is option d.

Explanation:

The wheels of cars have roughs. This shows that friction is very useful. As, If the wheels of cars had smooth surfaces, then they could have skid on the road and it would lead to many accidents. As the wheels are rough there is enough friction between the road and the wheels, for a smooth ride.

Answer 2

Answer:

d) wheels of cars have rough texture.  -shows that more friction is useful.

Explanation:

in cases a) , b) , c) ; the advantages of less friction is demonstrated.

Bowling lane should be smooth so that the ball can bold al the pins easily, when thrown carefully.

Slides should have smooth surface to enable easy sliding.

Heavy appliances have rollers to convert sliding (dragging) friction into rolling friction, i.e, to reduce friction.

But in 4th case, more friction in between tires and road will help gripping the road and prevent cars from skidding.

Thanks, have a great day ahead !  ; )