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Statement of a problem № 3221

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A small block of mass m slides along the frictionless loop-the-loop track as in Fig. 3.7. If it starts at A at height h = 5 R from the bottom of the track then show that the resultant force acting on the track at B at height R will be sqrt(65) mg.

Solution:
A small block of mass m slides along the frictionless loop-the-loop track as in

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