Ball rolling on incline
How fast does a ball have to be traveling at the edge of a ramp in order to not re-contact the corner of the ramp? In terms of ball radius r, gravitational acceleration g, incline angle , what is the minimal speed v that the ball must have at the edge of the ramp?
Adjust the parameter sliders. Either drag the time t slider or press the animate button. Checking the "set vmin" checkbox will set the speed to the minimum value required to not re-contact the corner. Unchecking the box will allow you to see the trajectory for speed values of your choosing.