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A 2000kg test car, traveling 60 ms hits a brick wall. Using motion pictures, the time involved is determined to be 0.050 s. What impulse does the car impart to the wall

Respuesta :

biancamilburn3
 impulse of car on the wall = change in momentum of the car = m v = 2000 x60 = 1.2 x10^5 N-sec
david8644

Answer:

6,000 N-s

Explanation:

In order to calculate the impulse of the car when hitting a brick wall, we just have to first calculate the force of the car, force equals mass times acceleration, since the speed of the car is 60 m/s and the brick wall is at 0 m/s the acceleration would be 60 m/s, then you just multiply:

[tex]Force= mass*acceleration\\Force= 2000kg*60m/s\\Force=120,000 N[/tex]

And now you just multiply that by the time that the car is involved in the hit with the wall.

[tex]Impulse= Force*Time\\Impulse=120,000N*0.050s\\Impulse=6,000N-s[/tex]

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