Sphere/disk rolling down an incline HELP!!! 1. The problem statement, all variables and given/known data a ball, or sphere with a radius of R and mass Mis rolling down an incline with a height of H and an angle of [tex]\Theta[/tex] how long does it take to get to the bottom 2. Relevant equations Conservation of mechanical energy Kf + Uf = Ki + Ui K = 1/2 (I/R^2 + M)v^2 3. The attempt at a solution i solved for the system with conservation of energy 1/2(I/R^2 + M )v^2 + 0 = 0 + Mgh solved for final velocity of the ball or disc at the bottom of the incline and got v = [2gh/1 + ( I/ MR^2)]^0.5 set H=MG[tex]\Theta[/tex] and got v = [2gMG[tex]\Theta[/tex]/1 + ( I/ MR^2)]^0.5 i am having trouble however seeing how i can solve for time t in terms of all the variables.....please help!!!!!