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Unread 11-01-2009, 00:03
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SomeoneWhoIsntMe
AKA: James Meintjes
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Join Date: Oct 2006
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Re: 4WD Turning Difficulties

Quote:
Originally Posted by iCurtis View Post
While we didn't use exact weights, we drove a 4 CIM AM Shifter in Low Gear (with a long drive base) at about 30 pounds and about 180 pounds (yes, I know this is 30 pounds more than an actual robot!). While noticeable, the difference in turning ability was nothing to write home about.
a = f/m
friction force = normal force * mu
normal force = mass * gravity

a = ( mass * gravity * mu ) / mass

a = mu * gravity


so, a 30lb robot and a 180lb robot should be able to change direction equally fast.

perhaps the 30lbs and the 180lbs were distributed differently, changing the moment of the center of gravity?