Momentum Flipping Physics Name ______
You can’t run from Momentum
What is the symbol for momentum?
What is the SI unit for momentum?
How do you have zero momentum?
Force of Impact Equation Derivation
All AP Physics students will need be able to reproduce this derivation on a quiz!
So take notes!
What equation do they start with?
What equation do they end with?
Which equations and/or concepts do they need to use in between?
What is the most important use of this new formula?
Calculating the Force of Impact When Stepping Of the Wall
What two parts do you need to break the problem into?
How do the students represent this break into two parts?
What are some different ways to find the velocity immediately before impact?
Why is the final answer negative? Whys is the velocity before the impact negative?
Impulse Introduction
Take 3 notes on this video:
Proving and Explaining the Impulse Approximation
Take 3 notes on this video:
How to Wear Helmet: a PSA From Flipping Physics:
The impulse approximation:
This basically means that during a collision we can say “force” instead of “net force” because one force is so big and important.
Write the impulse formula:
Which variables within this formula are affected by the helmet?
[note: Mr. P does this same exercise]
When the time of impact is greater, what happens to the force of impact?
What are some devices that work by increasing the time of impact?
Introduction to Conservation of Momentum with Demonstrations
Under what conditions does conservation of momentum apply
The first minute and 20 seconds of this video explains this:
Mr. P throws a medicine ball while on a skateboard. How is this an explosion in a physics sense?
Explain how a rocket works using conservation of momentum:
[Seriously, it’s stuffed animal day? That’s like every day in my class.]
Introductory Conservation of Momentum Explosion Problem Demonstration
Write the equation used to solve the problem.
What formula did Mr. P use to calculate the error in his experiment:
How did he calculate the observed and theoretical values?
Why doesn’t it work with a very low mass wooden ball?
Introduction to Elastic and Inelastic Collisions
Take 3 notes on this video:
Introductory Perfectly Inelastic Collision Problem:
Is momentum conserved? Why?
Is kinetic energy conserved?
How did Mr. P measure the speed of the ball before the collision?
Write the symbolic formula Mr. P invented to solve this problem:
Why is the final answer negative?
How did Mr. P measure the speed of the cart and ball after the collision?
Introductory Elastic Collision Problem Demonstration
What variable cancels out because it is in every term of the equation?
Sketch the position-time graph of the cars during this situation.
Explain why the slope of cart 1’s line decreases.
Explain why the slope of cart 2’s line increases.
Because this is an elastic collision, new equations apply.
Write these new equations, and explain why they apply:
Explain why these new equations apply.
[You should watch the second half of this video a couple times in order to make sure you understand how Mr. P tests the collision is elastic. Elastic collisions are certainly a topic on the AP exam.]
At the end, some random dude suddenly appears. What is his problem?
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