Question

1. friction is____ if your tires are over - inflated or are worn smooth. this makes it ____for you to stop you vehicle.

a. ○ decreased, harder
b. ○ increased, harder
c. ○ decreased, easier
d. ○ increased, easier

1. in order to keep a vehicle in a turn without allowing centrifugal force to pull the car out, what should you not do?

a. ○ decelerate before the curve.
b. ○ brake gently and gradually while turning.
c. ○ downshift (manual transmission).
d. ○ accelerate while turning.

1. if you are parking facing downhill, you should always turn your front wheels ______the curb or side of the road.

a. ○ away
b. ○ towards
c. ○ either away or towards
d. ○ none of the above

Explanation:

Question 7

Friction between tires and road depends on tire condition. Over - inflated or worn - smooth tires have less contact with the road, so friction is decreased. Less friction means it's harder to stop the vehicle as friction helps in decelerating. So the correct option is A.

Centrifugal force acts outward during a turn. To counter it and keep the vehicle in the turn, we need to manage speed. Decelerating before the curve, braking gently while turning, and downshifting (in manual) help reduce speed. Accelerating while turning increases speed, which increases centrifugal force and makes it more likely for the car to be pulled out. So we should not accelerate while turning, the correct option is D.

When parking downhill, turning the front wheels towards the curb or side of the road is a safety measure. If the vehicle starts to roll, the wheels will hit the curb and stop the vehicle from rolling into traffic. So the correct option is B.

Answer:

A. decreased, harder

Question 8