8 - momentum and collisions 2

Question 1

impulse for constant force

Answer 1

Ft = change in momentum = mv-mu

Question 2

impulse for variable force

Answer 2

∫ F dt

Question 3

oblique impacts

Answer 3

impulse is perp to the wall
velocity component parallel doesn’t change - only perp changes
resolve using perp and parallel - then make parallel equal and use e to find perp

Question 4

using vectors to find impulse

Answer 4

I = mv - mu
can draw a triangle of mv and mu pointing out and I pointing from mu to mv