A 4,000-kg car traveling at 20 m/s hits a wall with a force of 80,000 N and comes to a stop. What was the impact time?

Question

Physics

Leroy Madden

25 February, 20:51

A 4,000-kg car traveling at 20 m/s hits a wall with a force of 80,000 N and comes to a stop. What was the impact time?

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Silvia · Answer 1

Deceleration a=Δv/t - > t=Δv/a

Δ v=20 m/s (from 20m/s to 0m/s)

from Newton's second law of motion: a=F/m

F=80000N

m=4000kg

a=80000/4000=20 m/s^2

t=20m/s / 20 m/s^2 = 1s