vazquezemmy8
06.09.2019 •
Social Studies
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.
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Ответ:
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.
Ответ: