Answer to Question #320414 in Physics for Jia

Question #320414

A 1.5ton automobile crashed into a wall at a speed of 10mi/h. the car moved 5in. before being

brought to rest. What was the average force exerted on the wall be the car?


1
Expert's answer
2022-03-29T16:46:23-0400

Given:

m=1500kgm=1500\:\rm kg

v0=10mi/h=4.47m/sv_0=10\:\rm mi/h=4.47\:\rm m/s

d=5in=0.127md=5\:\rm in=0.127\: m


The average force exerted on the wall by a car

F=ma=mv022d=15004.47220.127=1.18105NF=ma=\frac{mv_0^2}{2d}=\frac{1500*4.47^2}{2*0.127}=1.18*10^5\:\rm N


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