Homework Problems

HRW99P046: A mess kit explodes into two pieces, masses and velocities given. Find the velocity of the original mess kit

HRW99P101: Two shoe boxes collide and fall off a table. Find the final kinetic energy

HRW99P048: A spring pushes two balls apart; find their kinetic energies

Homework Problems

#1 on Momentum #2
#4 on Momentum #2
#15 on Momentum #2

Virtual Lab: Collisions

Today in class we worked through a free response problems then did a virtual lab: Collisions.

If you did not finish in class, please finish at home. I also need a few more Ballistic Pendulum labs and pre-labs from last week.

Homework Problems

#2 on Momentum #1: Two people in a canoe
#3 on Momentum #2: Dog walking on a boat

Ballistic Pendulum

Today we used a ballistic pendulum to find the launch velocity of a projectile. People have been using ballistic pendulums in this way for over a century.

First we completed a pre-lab to discover how a ballistic pendulum works: Ballistic Pendulum Pre-Lab

For your lab itself, this is what you need to turn in on your own paper:

1. Data table
2. Math (equation from end of pre-lab)
3. Answer
4. Name two errors, explain what they did to your data (mathematically), and how you could minimize or eliminate them in the future.

Series of Collsions and Two Kinds of Collisions

Finding the average force exerted on a target being hit by a stream of projectiles:
Series of Collisions

An overview of the two kinds of collisions. You might already know these from last year.
Collisions Part I: 2 Kinds

Lecture: Momentum Review - Some New Stuff

This is mostly the review we did in class on Friday, but I added a little more so it's worth watching.

Overview: Momentum, Impulse, and Recoil

Center of Mass Continued

Finding the Center of Mass in 2 Dimensions
Finding the Center of Mass for Objects of Uniform Density

Center of Mass Lecture

Today in class we went over some AP exam paperwork, then we had some fun trying to pick up chairs and touch our feet to explain center of mass. Here are two videos that dive into the quantitative side of finding center of mass.

Center of Mass System of Particles
Center of Mass Systems of Particles Example

Please watch these tonight, then try your new WebAssign homework.

KEYS Summer Internship

This looks like a great opportunity and experience. The application deadline is coming up, though, so get on it!

keys.pharmacy.arizona.edu