Register to reply

Conversion Question

by MJC8719
Tags: conversion
Share this thread:
MJC8719
#1
Jun2-07, 08:34 PM
P: 41
A centrifuge is a common laboratory instrument that separates components of differing densities in solution. This is accomplished by spinning a sample around in a circle with a large angular speed. Suppose that after a centrifuge in a medical laboratory is turned off it continues to rotate with a constant angular deceleration for 16.7 s before coming to rest.


(a) If its initial angular speed was 3170 rpm, what is the magnitude of its angular deceleration?
rev/s2



(b) How many revolutions did the centrifuge complete after being turned off?
rev


I believe I have found the answer in radians/s^2 and radians and was wondering how to convert them to rev/s^2 and revs.

Below is my work:

(a) 3170 x 2pi/60 x 1/16.7 = -19.8779 radians/s^2


(b) (1/2)(3170 x 2pi/60) x 16.7 = 2771.877 radians
Phys.Org News Partner Science news on Phys.org
Physical constant is constant even in strong gravitational fields
Montreal VR headset team turns to crowdfunding for Totem
Researchers study vital 'on/off switches' that control when bacteria turn deadly
CaptainZappo
#2
Jun2-07, 08:45 PM
P: 93
There are 2pi radians in one revolution. This should be all you need to convert.

Also, note that part (a) calls for the magnitude of the angular acceleration; thus, a sign (+ or -) is not needed.


Register to reply

Related Discussions
Just a SI conversion question Introductory Physics Homework 2
Data conversion question Computing & Technology 4
Luminosity Conversion Question General Physics 1
Dumb conversion question Introductory Physics Homework 3
Easy Conversion Question Introductory Physics Homework 2