Four particles have velocities , ,

PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics

Problem

Four particles have velocities

1

0

2

, and

3\,\mathrm{m/s}

. The root-mean-square velocity of the particles is (1)

3.5\,\mathrm{m/s}

(2)

\sqrt{3.5}\,\mathrm{m/s}

(3)

1.5\,\mathrm{m/s}

(4)

\sqrt{\frac{14}{3}}\,\mathrm{m/s}