4 - Elastic Collisions in one Dimension Flashcards
1
Q
When does Newton’s law of restitution apply?
A
In a free space or smooth surface.
2
Q
What is Newton’s law of restitution?
A
speed of separation/speed of approach = e and e is between 0 and 1.
3
Q
When will e = 1?
A
Perfectly elastic collision - speed the same.
4
Q
When will e = 0?
A
Totally inelastic collision - coalesce and come to rest.
5
Q
What if velocity is unknown.
A
Solve simultaneously with the principle of conservation of linear momentum.
6
Q
How is Newton’s law applied to one particle colliding with a smooth plane?
A
Speed of rebound/speed of approach = e.
7
Q
What if it collides normally?
A
Direction perpendicular to plane before impact.
8
Q
What is the loss of kinetic energy due to impact?
A
(1/2m1u1^2 + 1/2m2u2^2) - (1/2m1v1^2 + 1/2m2v2^2)
