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# OCR M3 Questions: Help required Watch

1. Hi,

Looked around and couldn't find an OCR M3 thread, so thought I might as well post one.

I got stuck on the following question: (OCR Textbook page 110 Q 6)

A pub puts up a rectangular signboard on the pavement supported by two light struts hinged to it at the 2 upper corners. The board and the struts are at 80 degrees to the horizontal and the struts are in the same vertical planes as the board. The mass of the board is 5kg. Find the force on the board from each strut, and the least possible coefficient of friction between the board and the pavement.

Thanks for the help.
2. Anyone?

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