Quote:
Originally Posted by mastachyra
The final point of contact must be point D so the force on the rail is downward.
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If D is contacting the rail then the force
on the rail at D must be
upward (perpendicular to the rail)
... and the force
on the D roller is
downward (perpendicular to the rail)
Quote:
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I know this is pretty messy and the progress is kind of scattered, but here's my full FBD of the cart. Wheels A and D are contacting the rail: 16423 N at point A and 632 N at point D.
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Double-check that 632N number.