Van hits concrete support In a crash test, a van collides with a concrete suppor

Question

Van hits concrete support In a crash test, a van collides with a concrete support. The stopping time interval for the collision is 0.12 s, and the impulse exerted by the support on the van is 8100 Ns.

Determine the change in momentum.

Determine the average force exerted by the concrete support on the van.

If the van is constructed to collapse more during the collision so that the time interval during which the impulse is exerted is tripled, what is the average force exerted by the concrete support on the van?

Explanation / Answer

a) Change in momentum = change in impulse = -8100 kg m s^-1
b) Average force = Impulse/Time = 8100 / 0.12 = 67500 N
c) As time interval is tripled then average force is reduced one third.

F =  8100 / 0.36 = 22500 N

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