# mechanics help,

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• December 4th 2008, 01:04 PM
Tweety
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.
• December 5th 2008, 05:28 AM
Tweety
is this moments equation correct...

taking moments about P ,

$2g \times 1m + 3g (xm-3m) =0$ ?

this gives x=2.3m and my book says the answer is $\frac{1}{3}$
• December 16th 2008, 08:17 AM
Grandad
Clarification needed
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