A wheel starts from rest and has an angular acceleration of 4.0 rad/s^2.
Favorites|Homepage
Subscriptions | sitemap
HOME > Physics > A wheel starts from rest and has an angular acceleration of 4.0 rad/s^2.

A wheel starts from rest and has an angular acceleration of 4.0 rad/s^2.

[From: ] [author: ] [Date: 11-05-03] [Hit: ]
velocity,start position,I like to call it s(t), but thats just me.......
the time it takes to make 10 revolutions is ..

the answer is 5.6 seconds. i don't know how to get to the answer
please write step by step
thanks

-
10 revolutions is also 20π radians.

You can treat this the same as you would an acceleration problem with distance. Treat radians the same way you would meters.

Set up a function
θ(t) = 1/2*(4.0)t^2
Where θ is the angle in radians.
Set the function equal to 20π and solve for t
t^2 = 2(20π)/(4.0)
t = 5.60 sec

If you don't know how I got that function, here's the setup of a regular position time function (it assumes constant acceleration)
acceleration, a
velocity, v
start position, d

s(t) = 1/2at^2 + vt + d

I like to call it s(t), but that's just me.
1
keywords: and,an,of,2.,angular,wheel,starts,from,rad,4.0,has,acceleration,rest,A wheel starts from rest and has an angular acceleration of 4.0 rad/s^2.
New
Hot
© 2008-2010 http://www.science-mathematics.com . Program by zplan cms. Theme by wukong .