momentum and impluse

Question 1

what is an elastic or inelastic collision?

Answer 1

One where momentum and kinetic energy is conserved. No energy is dissipated as heat or sound.
In an inelastic collision some of the energy gets converted but momentum is still conserved.

Question 2

what does the second law say about momentum?

Answer 2

The rate of change of momentum of an object is directly proportional to the resultant force which acts on the object.

Question 3

what is impulse ?

Answer 3

change in momentum.

Question 4

what is force in terms of momentum?

Answer 4

the rate of change of momentum.

Question 5

what are the units of momentum?

Answer 5

newton seconds.

Question 6

on a force time graph, what does the area under the graph represent?

Answer 6

impulse.

Question 7

if you were given a force time graph of an object that was originally at rest, and asked to find the momentum of the object after a certain time, how would you find it?

Answer 7

The area under the graph is the impulse which is the final momentum minus the original momentum. The original momentum was 0 so the area under the graph before that certain time is the momentum.

Question 8

give one similarity and one difference between an elastic and inelastic collision?

Answer 8

Momentum is conserved. KE isn’t conserved in an inelastic.