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Standard XII

Physics

Average velocity

A car acceler...

Question

A car accelerated from initial position and then returned at initial point, then

average velocity is zero but average speed is non-zero.

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average speed is zero but average velocity is non-zero.

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both speed and velocity has non zero average.

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both speed and velocity has zero average.

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Solution

The correct option is A average velocity is zero but average speed is non-zero.
As the net displacement = 0
Hence, average velocity = 0; but average speed is non-zero as the distance is non-zero

Also,
$\frac{| A v e r a g e v e l o c i t y |}{| A v e r a g e s p e e d |} \leq 1 \Rightarrow | A v . s p e e d | \geq | A v . v e l o c i t y |$

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A car accelerated from initial position and then returned at initial point, then

The correct option is A average velocity is zero but average speed is non-zero.As the net displacement = 0 Hence, average velocity = 0; but average speed is non-zero as the distance is non-zero Also, |Average velocity||Average speed|≤1⇒|Av.speed|≥|Av.velocity|