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angled forces - x comp
Ftcosθ−Ff=maFt\cos\theta-Ff=maFtcosθ−Ff=ma
angled forces y comp
Fn+Ftsinθ−Fg=maFn+Ft\sin\theta-Fg=maFn+Ftsinθ−Fg=ma
incline planes II comp (going down)
Fgsinθ−Ff=maFg\sin\theta-Ff=maFgsinθ−Ff=ma
incline planes perp comp (going down)
Fn−Fgcosθ=maFn-Fg\cos\theta=maFn−Fgcosθ=ma