box with mass m goes down a ramp that makes an angle of 60 º with the horizontal. The ramp bands together to a flat section and then onto a circle track of radius R that ends where it's vertical. box is released from rest at a distance 3R above the horizontal and leaves the track at point A. all surfaces are frictionless. What force does the track exert on the box before it leaves the track?

box with mass m goes down a ramp that makes an angle of 60 º with the horizontal. The ramp bands together to a flat section and then onto a circle track of radius R that ends where it's vertical. box is released from rest at a distance 3R above the horizontal and leaves the track at point A. all surfaces are frictionless. What force does the track exert on the box before it leaves the track?