2007-09-27 Basic relativity and projectiles

Today's nonsense
- Only six people in class today (golf (Alli?), sick (Luisa), homebound (Amanda), homebound (Meg))
- No wind-up toy car (!)
- Lots of people walking around with playdoh (which we are told not to eat)
- Spiller knows what a 'tiddle' is (not a tilde) but not an apostrophe? What's with this?
- Should we make a bananna gun/launcher?

#47 from the handout

ex 6) A car is traveling east at 60 km/h. It rounds a curve, and 5 seconds later it is traveling north at 60 km/h. Find the average acceleration. Find the magnitude and direction of the average acceleration. So: find the vector, then the magnitude and direction. Note that this is at a constant speed- it's also changing direction. The average acceleration is going to be the change in velocity-vector of the change in time. So what are the two velocity vectors?

Projectile motion

Don't tell PETA about this, but we're going to try to shoot monkeys with a bananna gun. "Alright, you want monkey brains with your eggs this morning so you're shooting the bananna at the monkey ..." When you shoot the bananna, at the same time you fire, the monkey is going to drop from the tree.