Practice Question

1.State the definition of the following:

a)Stopping distance

The stopping distance is the sum of the thinking distance and braking distance

b)Thinking distance

Thinking distance is the distance travelled by a car in the time it takes the driver to react. 

c)Braking distance

Braking distance is the distance travelled by the vehicle whilst a braking force is being applied to stop the vehicle.

d)Reaction time

The reaction time is the time period that occurs during the thinking distance.

2. A car at a particular speed has a stopping distance of 50m and a thinking distance of 15m. Calculate the braking distance.

Braking distance = stopping distance – thinking distance

Braking distance = 50m -15m = 35m

3. Estimate the thinking and braking distanec of a vehicle at 80mph.

Thinking distance = 24m

Braking distance = 98m approx

4. There are two cars; Car A and Car B. The brakes on Car A will function normally, but the brakes on Car B are worn out and need replacing. 

Draw two speed time graphs on the axes below to represent car A and car B. Assume that in both cases the thinking distance is the same for both.