Figure (8-E17) shows a smooth track which consists of
a straight inclined part of length l joining smoothly with
the circular part. A particle of mass m is projected up
the incline from its bottom. (a) Find the minimum
projection-speed v0 for which the particle reaches the top
of the track. (b) Assuming that the projection-speed is
2v0 and that the block does not lose contact with the
track before reaching its top, find the force acting on it
when it reaches the top. (c) Assuming that the
projection-speed is only slightly greater than v0, where
will the block lose contact with the track ?
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