1.

A small solid sphere of radius \[r\] rolls down an incline without slipping which ends into a vertical loop of radius \[R\]. Find the height above the base so that it just loops the loop

A. \[\frac{5}{2}R\]           
B. \[\frac{5}{2}(R-r)\]
C. \[\frac{25}{10}(R-r)\]    
D. \[\frac{27}{10}R-\frac{17r}{10}\]
Answer» E.


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