The 1-lb block is given an initial velocity v0 = 14 ft/s to the right when it is in the po...

The 1-lb block is given an initial velocity v0 = 14 ft/s to the right when it is in the position θ = 0, causing it to slide up the smooth circular surface. Determine the normal force exerted on the block by the surface when θ = 60°.