(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A block of mass 10kg on a rough plane inclined at 30deg to the horizontal. A horizontal force P acts on the block. The coefficient of friction between the block and the plane is 0.4, and it is sufficiently small for the block to slide down the slope if P does not act. Find the range of possible values of P if the block remains stationary.

2. Relevant equations

3. The attempt at a solution

Ive made an attempt but I think I may be wrong, before I bother post it, can I just check a few of my assumptions are correct?

- The surface reaction is perpendicular to the "rough plane".

- The friction force is directed directly up the "rough plane".

Im not too confident on those 2 assumptions and my initial attempt goes on those 2 being true :S

can someone please clarify?

thanks

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# Homework Help: Friction and Forces

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