Help mechanics
I don’t get why for part a they do 10gsintheta is equal to friction. Don’t those 2 forces act in same direction so you add? My diagram is on whiteboard and to me they’re going in same direction
(edited 11 months ago)
For part a) weight or gravity is acting down the plane so friction must act up the plane as its in equilibrium/opposing motion. There is no P in part a) so weight and friction must be equal and opposite forces.
In b) as P is acting up the plane and is maximal, then friction must be opposing motion and now acting down the plane.
In b) as P is acting up the plane and is maximal, then friction must be opposing motion and now acting down the plane.
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