Transcript Notes - Section 1 Momentum and Impulse

Section 1: Momentum and Impulse
Just a few
Q’s
1) What is your understanding of
momentum?
2) What factors cause an object to have
momentum?
3) If an object has momentum, what does
that tell you about it?
Notes:
Momentum:
Momentum is like inertia in
motion.
Momentum = Mass x Velocity
Or p = mv
Problem: A .2kg baseball
approaches the plate with a
velocity 20m/s. Find its
momentum.
What is impact???
Balloon Toss Demo:
Get a partner and fill one balloon. Referrals to
those who throw them at each other. 
Impulse: Change in momentum
Derivation:
When objects are stopped slowly…..
When objects are stopped quickly…..
(Demo: Desk Jump)
Sample Problem 1:
Find the following for a
.5kg baseball when
colliding with a wall
and coming to a stop
from 10m/s.
a) Impulse
b) Force to stop in .009s
Sample Problem 2:
Find the following for the
.5kg ball:
a) Change in momentum
b) Impulse
c) Force to stop in .009s
Describe how to increase the
impulse? (wood breaking demo)
Reduce the impact force, so don’t
forget to wear your helmet!
Compression of a golf ball
Turbines
Warm-up: Find the Impulse for Each
Situation. The mass of the car is 1000kg
Impulse Demos:
1) Egg toss
2) Chair Jump
3) Balloon Toss
Find the total momentum before
and after the collision 
Egg Launch Lab
Objective: Wrap three eggs in a container so
that when launched against a wall, they will
not break.
Grading:
No eggs break- 20/20
1 egg breaks – 17/20
2 eggs break – 14/20
3 eggs break – 10 /20