Replace the force system by a wrench

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Replace the force system by a wrench and specify
the magnitude of the force and couple moment of the wrench
and the point where the wrench intersects the x–z plane.
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I think the position vectors are backwards, they go from P to Forces LOA.

whitedancer
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Thank you so much 😊 your videos greatly helped me with my exams

jennethfaciol
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I wasted my 3 hours in just solving this problem thankyou man you saved me. Love from India

adityavishwakarma
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18:45 he is trying to cancel the value of what? with the value of ? jk

robercarrillo
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why do you write the second and first column again?

johannstrydom
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10:15 - Why does the first and second column need to be re-written? I haven’t taken linear algebra yet, so I’ve never seen a matrix like that before. Can someone please explain why?

And what is the main difference between this and cross product of r X F?

initiald