Obtain expressions of energy at different positions in the verticle circular motion.

Dear Student,
Please find below the solution to the asked query:
 Lowest point of circular motion:Total energy =KE=12mv2Substitute v=5rgTotal energy=12m5rg2                        =5mrg2Highest point of circular motion:Total enery=PE+KE=mgh+KE=mg2r+12mv2Substitute v=rgTotal energy=2mgr+12mrg2                       =2mgr+mgr2                       =5mrg2
Hope this information will clear your doubts about Vertical circular motion.
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