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 8600 Ns.

Part A

Determine the change in momentum.

Express your answer to two significant figures and include the appropriate units.

Part B

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

Express your answer to two significant figures and include the appropriate units.

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?

Express your answer to two significant figures and include the appropriate units.

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 8600 Ns.

Part A

Determine the change in momentum.

Express your answer to two significant figures and include the appropriate units.

Part B

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

Express your answer to two significant figures and include the appropriate units.

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?

Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

t =0.12 s, impulse =8600 N.s

Part A:

impulse = change in momentum = 8600 N.s

Part B:

F = impulse/time = 8600/0.12 = 72000 N

impulse = 3*8600

F = 3*8600/0.12 = 220000 N

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