# PHYS 120 Lecture Notes - Lecture 18: Angular Acceleration

## Document Summary

A meter stick has a mass of m = 0. 148 kg. Initially it hangs from two short strings: one at the 25 cm mark and one at the 75 cm mark. What is the initial angular acceleration of the meter stick about its pivot point? (you may assume the rod pivots about the left string, and the string remains vertical) After the right string is cut, the meter stick swings down to where it is vertical for an instant before it swings back up in the other direction. Where is the angular acceleration of the meter stick a maximum: rotational statics ii page 1. A ;adder pf length l = 2. 6 m and mass m = 16 kg rests on a floor with coefficient of static friction s = 0. 49. A person with mass m = 66 kg now stands at the very top of the ladder.