Complete the sentence: The faster your reactions,
The shorter your reaction time.
Complete the equation for thinking distance
Thinking distance = speed of the car × driver’s reaction time
Which of the following distances will be affected if a driver is under the influence of alcohol? Underline the correct answer or answers:
- *Thinking distance braking distance stopping distance**
- *(Braking distance is not affected by alcohol)**
Write down three factors affecting car braking distance.
- *Air bags**
- *Seatbelts**
- *Crumple zones**
Fill in the gaps to explain how these safety features help to prevent or reduce injury.
- In a crash the driver’s momentum goes from high momentum to zero momentum very quickly.
The longer the time taken to stop, the smaller** the force on the driver and the smaller the risk of injury. Air bags, seatbelts and crumple zones all **increase the amount of time it takes the driver to stop moving during a collision.
During a collision, momentum is conserved. What does this mean?
The total momentum before the collision = the total momentum after the collision
