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Radius of gyration of a body about an ax...

Radius of gyration of a body about an axis at a distance 6 cm from its centre of mass is 10 cm. Find its radius of gyration about a parallel axis through its centre of mass.

A

800 cm

B

8 cm

C

0.8 cm

D

80 m

Text Solution

Verified by Experts

The correct Answer is:
B

`T_(AB)=I_(CM)+Mh^(2)`
`MK_(AB)^(2)=MK_(CM)^(2)+Mh^(2)`
`K_(AB)^(2)=K_(CM)^(2)+h^(2)`
given, `K_(AB)=10cm,h=6cm`
Putting them, we get
`K_(CM)=8cm`
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