Impulse + Momentum + Redtituion

Question 1

Impulse = ?

Answer 1

Force x time

Or change in momentum

Question 2

Remember impulse is conserved, how to see what direction impulse applied in

Answer 2

Just what direction you took as positive, look in that direction to apply impulse

So tension string will apply impulse to bith bodies, but one negative

Use common sensne

Question 3

Restitution coeffeicmt

Formula for speed of separation?

Answer 3

Speed of separation / speed of approach

Speed of separation = vb - va

Question 4

Speed of approach how to work out?

Answer 4

Same direction = big - small

Opposite directions = add

Question 5

Relative voelcities?

Answer 5

Just do vaB = va - vb

Velocity a respect to b = velocity of a to earth - velocity b to the eart

Question 6

Elastic collision?
Energy + resititon?

Answer 6

When energy conserved, and restriction is 1

Question 7

If e = 0 what does that mean for motion of particles

Answer 7

It means that the velocities are the SAME after impact , they COALESCE AND MOVE TIGETHER

Question 8

Remmeber you can use energy to find at velocities and thus find out rsritiuojs!

Question 9

For min speeds needed to collide questions what must it be

Answer 9

The thing colliding MUST BE GREATER SPEED