Question
Asked Oct 24, 2019
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A 0.250 kg0.250 kg toy car moving with a speed of 0.860 m/s0.860 m/s collides with a wall. The figure shows the force exerted on the car by the wall over the course of the collision.

What is the magnitude of the velocity, or final speed, of the car after the collision?

10-
0.05
0.10
Time (s)
Force (N
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10- 0.05 0.10 Time (s) Force (N

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Expert Answer

Step 1

The force versus time graph is shown below.

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10 В E А С 0.05 G н 0.10 0 Time (s) Force (N)

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Step 2

The impulse acting on the car by the wall during the collision is the area under the force versus the time graph.

The area under the curve is

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Area area of AABC +area of ABFD area of ADEF area of rectang le BEGC+ area of AEGH ACBC)D)) 1 1 (BF) ( DF)+ (FE)(DF) 2 2 +(BE) (EG)(GH) (EG) (001s)(8N)(0.01s)(2N)+(0.02s)(2N) +(0.03s)(8N)(0.02s) (8 N) 2 - 0.04 N s+0.01N s+0.02N -s +0.24 N s+0.08N s = 0.39N.s

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Step 3

The impulse acting on the car is equ...

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