Question
Two buses A and B are moving around concentric circular paths of radii `r_A` and `R_B` If the two buses complete the circular paths in the same time . The ratio of their linear speeds is :
Answer: Option B
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In this time period of both buses are same.
Here `T_1 = (2pi)/(omega_1)`
`T_2 = (2pi)/(omega_2)`
`because omega_1 = omega_2` `(because T_1 = T_2)`
`:.` `v_A/v_B = (r_A omega)/(r_B omega) = r_A/r_B`
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