1. Momentum/Impulse
12/13/16

2. Define momentum in your own human words.
Leave space for physics definition.
momentum= Mass times velocity, inertia in motion

3. On what does momentum depend?
A roller-skate and a Mac truck roll down a hill…
Which one would you step in front of to stop it?
Why?
Which one is going faster?
What if the roller-skate was going really fast and the truck was going really slow?

4. So.. It has to do with mass and velocity.
p=mv units
Defined: Mass times velocity, inertia in motion
My definition: “umph”

5. How is momentum changed?
Push harder  more momentum
Push for a longer time  more momentum
Called impulse I = Ft units = Ns
I = ∆p
F∆t = m∆v
Ns = kg m/s
kg m/s2 s = kg m/s
Impulse is also abbreviated as J

6. Derive p =mv I = F∆t I = ma∆t I = m (v/∆t)∆t I = m∆v
I = ∆p = m∆v = F∆t

7. F vs t graphs