Hartranft+Lab+20

Lab 20

Experiment 1:

(fishy) = 2(theta)/t^2 (fishy) = .34 rad/s/s

a = 2s/t^2 a = .0075

(fishy) = a/r (fishy) .32 rad/s/s

These measurements agree within the degree of uncertainty

Experiment 2:

I = T/(fishy) I = .162 kgm^2

Ipulleys = .00058, Irods = .0114, Imovable masses = .0914

Summation I = Ipulleys + Irods + Imovable masses = .1034

These measurements agree within the degree of uncertainty

Experiment 3:

Potential Energy = mgh = 2.25

Translation Kinetic Energy = 1/2mv^2 = .02

Rotational Kinetic Energy = 1/2I(omega)^2 = .02

Total Kinetic Energy = Translational + Rotational = .04

A massive amount of friction would have to been accepted to reconcile the difference between Potential energy and kinetic energy