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Progress is impossible without change; and those who cannot change their minds cannot change anything. ..."George Bernard Shaw(1865-1950, Irish dramatist, essayist and critic, Nobel Prize for Literature 1925)"
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Author Topic: Ball Rolling without slipping in a hill  (Read 3127 times)
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ahmedelshfie
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on: May 08, 2010, 09:33:43 pm » posted from:Uberaba,Minas Gerais,Brazil

This applet created by prof Hwang
Modified by Ahmed
Original project Ball Rolling without slipping in a hill

A ball or cylinder rolling (without slipping) down in a down hill slope.
The condition for rolling without slipping is
 v=R*ω (angular velocity) or a=R*α (angular acceleration)
where R is the radius of the ball or cylinder.

Assume the friction force is f
1. m*g*sinθ-f=m*a
2. R*f=I*α
3. I=(1/2)m*R2 for cylinder, (2/5)m*R2 for sphere
solve the above equation will give you
f=(1/3)m*g*sinθ for cylinder or f=(2/7)m*g*sinθ for sphere.
The following add a spring make it more complicated!

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Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
  • Please feel free to post your ideas about how to use the simulation for better teaching and learning.
  • Post questions to be asked to help students to think, to explore.
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Let's work together. We can help more users understand physics conceptually and enjoy the fun of learning physics!


* ball.gif (15.91 KB, 817x540 - viewed 249 times.)
« Last Edit: May 08, 2010, 09:42:06 pm by ahmedelshfie » Logged
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Progress is impossible without change; and those who cannot change their minds cannot change anything. ..."George Bernard Shaw(1865-1950, Irish dramatist, essayist and critic, Nobel Prize for Literature 1925)"
 
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