Answer to Question #210360 in Other for Bea

Question #210360

A 980kg car strikes a post at 8m/'s and comes to a stop in 0.20s. Find its initial momentum and the average force on the car while it is being stopped.

Expert's answer

The initial momentum is

"mv_0=980 \\ kg(8\\ m\/s)=7840\\ kg\\cdot m\/s"

The average force on the car is

"F_{ave}=\\dfrac{mv_0}{t}=\\dfrac{7840\\ kg\\cdot m\/s}{0.20\\ s}=39200\\ N"

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