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Easy Java Simulations (2001- ) => dynamics => Topic started by: ahmedelshfie on May 08, 2010, 09:33:43 pm



Title: Ball Rolling without slipping in a hill
Post by: ahmedelshfie on May 08, 2010, 09:33:43 pm
This applet created by prof Hwang
Modified by Ahmed
Original project Ball Rolling without slipping in a hill (http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=1025.0)

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!