Net impulse and what objects exerts force

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Homework Help Overview

The problem involves a car crash scenario where a car comes to a complete stop after hitting a wall. It presents questions regarding net impulse acting on the car and the driver, as well as the objects exerting the forces responsible for these impulses.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the calculation of net impulse and question whether time is needed for this calculation. There is an exploration of the definitions related to impulse and the forces involved in stopping both the car and the driver.

Discussion Status

The discussion includes attempts to clarify the concept of impulse and its calculation. Some participants have provided feedback on the original poster's understanding, while others have raised additional questions about the implications of impulse on the driver.

Contextual Notes

There is uncertainty regarding the need for time in calculating net impulse, and participants are exploring the definitions and relationships between the forces acting on different objects in the scenario.

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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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