Net impulse and what objects exerts force

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AI Thread Summary
To calculate the net impulse acting on the car, the formula used is the product of mass and velocity, resulting in 45,000 kg·m/s. The wall exerts the force that stops the car, while the car itself exerts the force that stops the driver. The discussion clarifies that time is not necessary to determine impulse, as it is defined as the change in momentum. The importance of understanding impulse in relation to both the car and driver is emphasized, highlighting the forces involved in a crash scenario. Overall, the conversation revolves around the concepts of impulse and the forces exerted during a collision.
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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. (this is about 65 mi/hr).

What is the net impulse that acts on the car to bring it to a stop? What is the net impulse that
acts on you to bring you to a stop?

What object exerts the force that causes the impulse that brings the car to a stop? What object
exerts the force that causes the impulse that brings you to a stop?

Homework Equations





The Attempt at a Solution


I'm not to sure how to find the net impulse, Don't i need time?

Car to a stop= (1500kg) X (30/s)= 45000kg X 65=2925000

Object exerts force to bring the car to a stop is the wall.
Object that exerts force to bring me to a stop is the car.
 
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I'm not to sure how to find the net impulse, Don't i need time?
No. Check the definition of "impulse".
 
thanks that really helped...
 
Sometimes a nudge is all it takes ;)
Enjoy.
 
What happened to the impulse on the driver?
 

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