Question

If the total KE=10 kJ before the purely elastic collision, what is the total KE after

Answer 1

In a purely elastic collision, energy is conserved, so the amount of energy before and after the collision is the same.

Answer 2

question if there were 2 objects with 100 KE before would it be the same after then?

Answer 3

If the collision is purely elastic the total amount of energy (both objects added together) is the same before and after the collision.

Answer 4

How do they conserve it?

Answer 5

It's a characteristic of the type of collision. If you imagine two pool balls colliding on a pool table, that collision is very nearly purely elastic, i.e. no energy is lost due to deformation of the balls, heat, etc. If you imagine two lumps of Silly Putty colliding and smushing together, that collision is inelastic, i.e. lots of energy is lost in deforming the lumps of putty.

Answer 6

So basically the energy from one gets put into the other?

Answer 7

Not exactly. It's the total energy of both that remains the same. They could both still have some energy both before and after the collision but some of the energy might be transferred from one ball to the other.

Answer 8

Ahh I see

Answer 9

Good job!

Answer 10

Thank you for explaining it for me :D

Answer 11

You're welcome