I ended up with F•d=mgh and F•d=(mv^2)/2 because of the work-energy principle. I also tried to isolate m in each case and equated the two results and got (F•d)/gh=2(F•d)/v^2
Homework Statement
A bead is sliding on a surface. At point A it is 80 cm above the ground, at point B it has just hit the ground and at point C it is 50 cm above the ground. At point A it has a speed of 200 m/s, so what will its speed be at point B and C?
Homework Equations
W=F.d
Kinetic...