What is the initial momentum of the car and rider in a collision?

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SUMMARY

The initial momentum of the car is calculated using the formula \( p = mv \), resulting in 45,000 kg·m/s for a 1500 kg car traveling at 30 m/s. The rider's initial momentum is determined by their mass, which must be converted from pounds to kilograms using the factor of 2.2 lbs/kg. The change in momentum for both the car and the rider is -45,000 kg·m/s, indicating a complete stop after the collision with the wall. This analysis confirms the conservation of momentum principle in a collision scenario.

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  • Understanding of momentum calculation using the formula \( p = mv \)
  • Knowledge of mass conversion from pounds to kilograms
  • Familiarity with the concept of conservation of momentum
  • Basic physics principles related to collisions
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  • Study the principles of conservation of momentum in elastic and inelastic collisions
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Students studying physics, particularly those focusing on mechanics and collision dynamics, as well as educators seeking to explain momentum concepts in practical scenarios.

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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)
 
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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...
 
That all looks right. Is that all you wanted to know?
 

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