The radius of gyration of a disc of mass 100 gm and radius 5 cm about an axis passing through its centre of gravity and perpendicular to the plane is(a) 0.5 cm (b) 2.5 cm(c) 3.54 cm (d) 6.54 cm
sumit kumar , 10 Years ago
Grade Upto college level
2 Answers
Saurabh Koranglekar
Last Activity: 4 Years ago
Vikas TU
Last Activity: 4 Years ago
the moment of inertia of a disc passing thrugh the centre of the axis is given by
i=mr^2/2
I=100*25/2
i=50*25
i=1250
radius of gyration is given by k=under root i/m
therefore the radius of a gyration is
k=under root 1250/100
k=under root 12.5
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