Wednesday
May 22, 2013

# Homework Help: physics

Posted by Hannah on Thursday, December 20, 2007 at 10:46pm.

A small sedan and a large pickup truck experience a head-on collision. Which vehicle experiences the greater impulse during the collision?

• physics - drwls, Friday, December 21, 2007 at 12:49am

Since the forces they exert on each other are equal and opposite (because of Newton's thrd law), the impulses that they exert are also of equal magnitude.

• physics - Jake1214, Friday, December 21, 2007 at 12:50am

Small sedan will experience a larger force because the truck is heavier (more mass and more momentum if they both travel at equal velocity) so it's not going to move much from the collision.

• physics - drwls, Friday, December 21, 2007 at 2:46am

• physics - Damon, Friday, December 21, 2007 at 5:09pm

Jake -
Impulse is force times time.
As DrWLS explained, the forces are equal and opposite.
The incident happens over the same time span for both.
So the force times the time is the same for both.

Although both have the same magnitude of change of momentum |mv| your intuitive reply would be correct if we were talking about change of speed. The bigger mass of the truck would cause it to change speed little but the small mass of the car would mean a large change in its speed.

Related Questions

Physics - Consider a perfectly inelastic head-on collision between a small car ...
Physics - A heavy truck and a small car collide head-on. Before the collision ...
Physics - If a Mack truck and Honda Civic have a headon collision, upon which ...
physics - In a crash test, a truck with mass 2600 kg traveling at 24 m/s smashes...
Physics - Which of the following statements are true? Select all that apply. ...
physics - A 2000 kg truck is at rest at a stop sign. A 1100kg car collides head-...
physics - A 2000 kg truck is at rest at a stop sign. A 1100kg car collides head-...
physics - A laden lorry of mass 3000kg travelling due east at 40 m.s -1 collides...
Physics - Object A crashes into object B. A is more massive than B. Which is a ...
Physics - &#8206;1. A 3kg body moving towards the east with a speed of 5 m/s...