Recent content by introphysics

no that's right, it's just that the kinetic energy is 1/2mv^2thank you so much this actually makes sense! :D

so I tried substituting for x according to the equation v2= v02 + 2a (x-x0). that gives: v02= -2asinB/(AcosB) then if I use ma=-mgsinB... v02= 2gsin2B/AcosB off by a factor of 3/2?

A warehouse worker is shoving boxes up a rough plank inclined at an angle B above the horizontal. The plank is partially covered with ice, with more ice near the bottom of the plank than near the top, so that the coefficient of friction increases with the distance x along the plank : mu=Ax...