Question

Four particles have velocity 1, 0, 2 and 3ms^-1 . The root mean square velocity of the particles is ………

(a) 3.5 ms^-1 

(b) \(\sqrt {3.5}\) ms^-1 

(c) 1.5ms^-1 

(d) Zero

Answer 1

Correct answer (b) \(\sqrt {3.5}\) ms^-1