Recent content by theskyiscrape

http://picasaweb.google.com/lh/photo/rznJA0qTwnaKK7JJyonh3vf8zyw4EhneH1Kd97H9px8?feat=directlink link to diagram

Homework Statement [PLAIN]http://picasaweb.google.com/lh/photo/rznJA0qTwnaKK7JJyonh3vf8zyw4EhneH1Kd97H9px8?feat=directlink A heavy ring with mass, m and radius, r is held in place by three cables and rests in the x-z plane. the ring being lifted is a distance h below the small ring...

This is the right answer P1/P2=F1v1/F2v2 ∴F2*2v1=F1v1 F2=0.5F1 so the force while going down is half the force while coming up. Ff=mgsinθ+0.5Ef Ef=2Ff-2mgsinθ equating the equations: 2μmgcosθ-2mgsinθ=μmgcosθ +mgsinθ μmgcosθ=3mgsinθ tanθ=μ/3 θ=tan-1(0.0933) =5.33 degrees..

that might be the case but axle friction and air drag have not been covered. to be honest, my solution was a stab in the dark...

Homework Statement a car's engine, producing a constant power, propels the car up a hill at a constant speed and down the hill at double the speed. if the coefficient of kinetic friction between the car and the road is 0.28, what is the angle of incline of the hill. assume the hill is...

Homework Statement A 150g ball is thrown vertically upward from a window 10m above the ground at a speed of 30m/s. At the top of its trajectory, it compresses a spring a distance, y. (spring constant k = 1.5 N/m). If the spring is 45m above the initial starting position of the ball...