StarterForce (newtons, N)

Mass (kilograms, Kg)

Acceleration (m/s2)

16 20 0.80200 400 5.0840 70 122.4 0.40 6.05000 25000 0.20

On the Road

L.O.: Work out what is the resultant force of a vehicle travelling at constant velocity.Define: thinking distance, breaking distance and stopping distance.Explain what factors can increase the stopping distance of a vehicle.

Velo

city

(m/s

)

Time (s)

Boy jumps into road

Driver presses breaks

Car stops

What determines the Stopping Distance?

The thinking distance is the distance travelled by the vehicle in the time it takes the driver to react.

The breaking distance is the distance the vehicle travels under the braking force.

Stopping distance = thinking distance + breaking distance.

In groups discuss how to fill in this table.

Factors affecting the thinking distance

Factors affecting the breaking distance.

Stopping distances.wmv

In groups discuss how to fill in this table.

Factors affecting the thinking distance

Factors affecting the breaking distance.

Influence on alcohol and drugsFatigue/stressDistractions

Excessive VelocityMass of the CarRoad ConditionsTyre ConditionsWeather Conditions

Stopping distances.wmv

To do:

1)Workbook page 65.

2)Worksheet 3c

On the Road

L.O.: Work out what is the resultant force of a vehicle travelling at constant velocity.Define: thinking distance, breaking distance and stopping distance.Explain what factors can increase the stopping distance of a vehicle.