Question

Which of these is true about momentum and kinetic energy in a collision within a closed system?

A. Momentum is conserved, but total kinetic energy is not conserved.

B. Momentum is conserved, but total kinetic energy may or may not be conserved.

C. Momentum may or may not be conserved, but kinetic energy is always conserved.

D. Momentum is not conserved, but kinetic energy is always conserved.

***What do you think? Thank you!! :)

Answer 1

total momentum is conserved, furthermore, if the collision is elastic, then also total kinetic energy is conserved, whereas if the collision is inelastic the total kinetic energy is not conserved

Answer 2

ohh okay, so that means it would be choice B? is that correct? :)

Answer 3

yes! that's right!

Answer 4

yay!! thank you!! :D

Answer 5

thank you!! :D