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how to do b

what is wrong here with bIMG_20200602_235121-compressed.jpg.jpegIMG_20200602_234600-compressed.jpg.jpeg
Original post by Hedwigeeeee
what is wrong here with b


The mass at B has been removed, so there is no "4x50g" when taking moments about A.
Original post by ghostwalker
The mass at B has been removed, so there is no "4x50g" when taking moments about A.


but the answer is still different... can u get the correct value?
Original post by Hedwigeeeee
but the answer is still different... can u get the correct value?


Should also note that Rp+Rq = 20g, not 70g.

Does that sort it - if not post working.
Now that the mass at B has been removed, the reaction forces at P & Q will total 20g. You know the distance of the centre of mass from A, which means you can work out how far away it is from P or Q. Take moments about P or Q to give you the reaction force at that point, then subtract this from 20g to find the other reaction force.

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(edited 3 years ago)

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