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

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
(d) `U_("rms")=sqrt((U_(1)^(2)+U_(2)^(2)+U_(3)^(2)+U_(4)^(2))/(4))=sqrt((54)/(2))=(sqrt(54))/(2)`
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