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Question

A circular disc is rotating with constant ω=2 rad/sec, about an axis passing through its centre. An object is kept at a distance of r1=2cm from the centre and another object is kept at a distance of r2=1cm. Find the ratio of their linear speeds.


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Solution

v=rω

v1=r1ω=2×2=4cmsec

v2=r2ω=1×2=2cmsec

v1v2=42=2


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