Thread: mechanics help,

A woman and a man support a non-uniform plank, AB of mass 10kg and length 4m. The woman holds the plank 1m from A and the man holds the plank at B. The vertical reaction provided by the woman is 56N find;

A) the vertical reaction force provided my the man

b) The position at which at which the weight of the plank acts measured from A.

is this moments equation correct...

taking moments about P ,

?

this gives x=2.3m and my book says the answer is

Hi -

Neither the diagram you attached nor the working you have given seem to apply to the same question. Please clarify what you want here.

Grandad