# Physics

posted by .

Consider a perfectly inelastic head-on collision between a small car and a large truck traveling at the same speed. Which vehicle has a greater change in kinetic energy as a result of the collision?

Since the vehicles stick together after the collision and take the direction of the large truck (greater momentum), I guessed that the small car would have a greater change in kinetic energy.

I can easily use formulas to find answers, but I always have trouble with conceptual questions like this.

• Physics -

Hmmmm. What is a perfectly inelastic collision as compared to an inelastic collision?

Momentum is conserved.

Mv-mv= initial momentum
after the collision...
Mv-mv=(M+m)v'

now which is greater?
v-v', or -v-v' Obviously, the smaller mass is greater (-v-v').

## Similar Questions

1. ### physics

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

In a head-on, inelastic collision, a 4000 kg truck going 10 m/s east strikes a 1000 kg car going 20 m/s west. (a) What are the speed and the direction of the wreckage?

A particle of mass m1, traveling at speed v0, collides head-on with a particle of mass m2 at rest. The collision is perfectly inelastic, i.e., the particles fuse together at the collision. Calculate the fraction of the initial kinetic …
4. ### physics

A 1,500-kg car traveling east with a speed of 25.0 m/s collides at an intersection with a 2,500-kg van traveling north at a speed of 20.0 m/s. Find the direction and magnitude of the velocity of the wreckage after the collision, assuming …
5. ### physics

a large bus and a van, both moving with a velocity of magnitude v, have a head-on-collision and both the vehicles stop after the collision. if the time of the collision is 1 sec then, a) which vehicle experiences smaller force of impact?
6. ### Physics

Most of us know intuitively that in a head-on collision between a large dump truck and a subcompact car, you are better off being in the truck than in the car. Why is this?

Most of us know intuitively that in a head-on collision between a large dump truck and a subcompact car, you are better off being in the truck than in the car. Why is this?
8. ### College Physics

Most of us know intuitively that in a head-on collision between a large dump truck and a subcompact car, you are better off being in the truck than in the car. Why is this?
9. ### Physics

At an intersection a car of mass 900kg traveling east collides with a pick up truck of mass 1800kg that is traveling North. Two vehicles stick together as a result of the collision, and after collision, the wreckage is sliding at 16m/sec …
10. ### Physics

A neutron with mass 1.67e-27 kg moving with speed 5.0 × 101 km/s makes a head-on collision with a boron nucleus, originally at rest, with mass 1.66e-26 kg. A) If the collision is completely inelastic, so the particles stick together, …

More Similar Questions

Post a New Question