Finding intial momentum

  • #1

Homework Statement


You are riding in a car that crashes into a solid wall. The car comes to a complete stop without bouncing back. The car has a mass of 1500 kg and has a speed of 30 m/s before the crash.

What is the car’s initial momentum? What is your initial momentum? (Recall that the weight
of one kilogram is 2.2 lbs) What is the change in the momentum of the car? What is the
change in your momentum?

Homework Equations





The Attempt at a Solution



CarI= (1500kg) X (30m/s)= 45000kg m/s
YouI=(Mass) X (30 m/s)

Car change= (1500kg) X (-30m/s)= -45000kg m/s
You change= (Mass) X (-30m/s)
 

Answers and Replies

  • #2
PhanthomJay
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Yes...where your mass in kg is your weight in pounds divided by 2.2.
I guess that is what the problem is asking....
 
  • #3
haruspex
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That all looks right. Is that all you wanted to know?
 

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