Work, Power and EnergyHard
Question
A body is allowed to slide down a frictionless track freely under gravity the track end in a semicircular shaped part of a diameter D. The height (minimum) from which the body must fall so that it completes the circle, is
Options
A.
B.
C.
D.
Solution
For the body to reach point B, the body must have least velocity of
at A.So for a body falling from height h.Velodcity =
= 
⇒ 2gh = 2g 
h =
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