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Originally Posted by Jibri Wright
It doesn't cause normal force to technically decrease.
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You need to go back and read Jason's post more carefully:
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this reduces the "normal force" (hey, physics in action) on the front and rear wheels
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Dropping the center wheels has exactly the effect described above by Jason, and this is the main reason why dropping the center wheels slightly makes the robot easier to turn.
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I learned of centripetal force last year and asked my mentor who also happens to be my A.P. Physics teacher is this what caused a dropped 6wd to turn smoothly. He said yes.
Study centripetal force and you'll know what im talking about.
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Could you please politely ask him to send me a PM?