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Four particles have speed 2, 3, 4 and 5 ...

Four particles have speed `2, 3, 4` and 5 cm/s respectively Their `RMS` speed is .

A

`3.5 cm//s`

B

`(27//2) cm//s`

C

`sqrt(54) cm//s`

D

`sqrt(54)//2 cm//s`

Text Solution

Verified by Experts

The correct Answer is:
D
`u_(rms)=sqrt([(2^(2)+3^(2)+4^(2)+5^(2))/(4)])=sqrt([(54)/(4)]) cm s^(-1)`
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