Road Science

Question 1

what is the difference between reaction distance and braking distance?

Answer 1

reaction distance is the distance you travel between noticing and the event and getting you’re foot on the brake, and the braking distance is the distance you travel between getting you’re foot on the brake and stopping.

Question 2

define the term Speed and it’s unit

Answer 2

The rate of change of distance with time (Metre per second)

Question 3

define the term acceleration and it’s unit?

Answer 3

the rate of change of velocity of an object with respect to time.
m/s 2

Question 4

what is the difference between speed and velocity?

Answer 4

speed is the rate at which an object is moving along a path, and the velocity refers to the rate and direction of an objects movement.

Question 5

What is the difference between average speed and the instantaneous speed?

Answer 5

while average speed is the total path traveled by the object divided by the total time taken for the motion to take place, instantaneous speed is the speed recorded at a specific time.

Question 6

what would you want the wheels of a car to keep rolling instead of locking when coming to an emergency stop? speaking in terms of static and sliding friction.

Answer 6

Because static friction occurs when the wheels are in motion, and the sliding friction is when you’re wheels are in lock.
the static friction is greater than sliding friction which means that if you keep the wheels turning the static friction will slow you down faster.

Question 7

What are factors that will effect the drivers reaction distance?

Answer 7

Age,
Distractions. (Phone, conversation, music)
Alcohol and drugs

Question 8

How can you find the instantaneous speed if the object isn’t changing direction?

Answer 8

You can find the instantaneous speed by looking at the slope of a speed-time graph.