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Questions  

Two bodies of masses 10 kg and 5 kg moving in concentric orbits of radii R and r such that their periods are the same. Then the ratio between their centripetal accelerations is

a
R / r
b
r / R
c
R2 / r2
d
r2 / R2

detailed solution

Correct option is A

ac=V2r=(rω)2r=rω2ac=4π2r/T2 (∵ω=2π/T)ac1=4π2R/T2 and ac2=4π2r/T2∴ ac1ac2=Rr

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Statement -A : The net acceleration of a particle in circular motion is always along the radius of the circle towards the centre
Statement -B : The velocity vector of a particle at a point is always along the tangent to the path of the particle at that point


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