Having trouble understanding General moment

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  • #2
Stephen Tashi
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If we have a lever CD pivoting at point C and with a force applied at D, one way to compute the torque of the force about the point C is multiply the component of the force that is perpendicular to CD times length CD. Another way is to imagine that CD is replaced by a lever that pivots at C and is perpendicular to the line of the force. Let this lever intersect the line of the force at point Y. The moment of the force about C is the length CY times the magnitude of the force. If you use the latter method the length of CY is h-r.
 

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