Question

Fill in the blanks. a. Grooves are made in tyres of vehicles to _______________ friction. b. When we stop pedalling a bicycle, it comes to rest due to____________. Frictional force always tends to _________________ the motion of a body. c. Lubricants ________________ friction between the rubbing surfaces.Fill in the blanks. a. Grooves are made in tyres of vehicles to _______________ friction. b. When we stop pedalling a bicycle, it comes to rest due to____________. Frictional force always tends to _________________ the motion of a body. c. Lubricants ________________ friction between the rubbing surfaces.

Answer 1

Answer:

increase

Explanation:

Because when the tyres have no grooves then it's difficult to apply brakes because of the decrement of friction between tyres and surface of road

Answer 2

Answer:1)increase

2) frictional force

Explanation:1) bcoz without groves friction won't be created and it would not be able to stop or change direction due to lessen friction.

2)the cycle stops bcoz of the opposing forces of friction between the surfacebof road and cycle.