First slide

Average Velocity

Question

A particle is moving along a straight line. It covers distance S with a velocity V. Then it covers a distance 2S with a velocity 3V in the same direction. Then magnitude of average velocity of the particle is

Moderate

A
3V
B
1.8 V
C
2.2 V
D
1.6 V

Solution

Average velocity = $\frac{T o t a l d i s p l a c e m e n t}{T o t a l t i m e} = \frac{S + 2 S}{\frac{S}{V} + \frac{2 S}{3 V}} = \frac{9 V}{5}$ = 1.8 V

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