You must not drive at excessive speeds. if you double the speed of a car, the force of impact in a crash is
- doubled.
- four times as great.
- five times as great.

Four times as great.

Explanation:

The force of impact is given by the impulse

Impulse is the change in momentum of an object

u = Initial velocity of the car

v = Final velocity of the car = 0

m = Mass of the car

When velocity is four times greater

So, if velocity is increased 4 times the momentum will increase four times thus increasing the force of impact by four times.

c is the answer for this