The force F on a sphere of radius r moving in a medium with velocity v is given by `F = 6 pi eta rv`. The dimensions of `eta` are
The force F on a sphere of radius r moving in a medium with velocity v is given by `F = 6 pi eta rv`. The dimensions of `eta` are
A. `[ML^(-3)]`
B. `[MLT^(-2)]`
C. `[MT^(-1)]`
D. `[ML^(-1)T^(-1)]`
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Correct Answer - D
`f=6n etarv`
`eta=(f)/(6pirv)=(MLT^(-2))/([L][LT^(-1)])=ML^(-1)T^(-1)`
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