Register to reply

Angular acceleration problem

by tigerlili
Tags: acceleration, angular
Share this thread:
Oct23-09, 05:02 PM
P: 62
1. The problem statement, all variables and given/known data

A flywheel turns through 22 rev as it slows from an angular speed of 6.5 rad/s to a stop. (a) Assuming a constant angular acceleration, find the time for it to come to rest. (b) What is its angular acceleration? (c) How much time is required for it to complete the first 11 of the 22 revolutions?

2. Relevant equations

n revolutions = 2npi radians

2npi= 1/2 alpha(t^2)
omega final^2 = omega initial^2 + 2alpha (2npi)

3. The attempt at a solution

i already got parts a and b, but i am confused about part c
the problem states that the angular acceleration is constant, so why can't i just use the kinematic analogue that i used to find the time in part a to find part c. please help!
Phys.Org News Partner Science news on
FIXD tells car drivers via smartphone what is wrong
Team pioneers strategy for creating new materials
Team defines new biodiversity metric

Register to reply

Related Discussions
Angular Acceleration Problem.. Why am I not right? Introductory Physics Homework 7
Angular acceleration problem... Help! Introductory Physics Homework 3
Another Angular Acceleration Problem Introductory Physics Homework 4
Angular acceleration problem Introductory Physics Homework 1
Angular Acceleration problem... Introductory Physics Homework 2