Which of the following are NOT units of time?
a) Second
b) Light year
c) Tropical year
d) Minute

Answer

A, B, C

Explanation

The cabin rotates with angular velocity `omegas` and radius R.
`:.` The particle experiences a force `mRomega^2`.
The component of `mRomega^2` alogn the provided force to the particle to move along AB.
`:. mRomega^2costheta=ma`
`rarr a=Romega^2 cos theta`
Length of groove L`
L=ut+1/2at^2`
`rarr L=1/2 Romega^2 cos theta t^2`
`rarr t^2=(2L)/(Romega^2costheta)`
`rarr t=sqrt((2L)/(Romega^2-costheta))`