PHYS 161H Lecture Notes - Lecture 12: Escape Velocity, Acceleration, Soda Straw
16 Mar 2016
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Questions from the notes: lec 22, pg 5, pt d. No torque or angular momentum as a vector on exam. Rotational dynamics, statics, newtonian gravitation, oscillations, fluid mechanics. If it takes 1/10 atm to blow up a balloon, then p=10^4 pa, so d=1m (ish) Pascals principle: not the weight of a liquid on top of another liquid, but the pressure that matters so a soda straw can cause a barrel to burst if its lon g enough. Not on tests, so extremely likely on final: conservation of angular momentum, bernoulli equation fluid dynamics. Equal weight to all class topics on exam. 7 or 8 questions two hour exam, but we"ll have three hours probably one essay question do not work out mathematically. =mg*2r+mg(1/2)r+(1/5)m*g*r mg*r(27/10) m*g*h=(27/10)m*g*r h=(27/10)r: forces on the ball in the track, at the bottom of the loop: be able to find speed at bottom of loop, normal force at the curvature mgh=(1/2)m*v(bottom)^2+(1/2)(2/5)m(v(bottom)^2)
