A particle is moving from point A to point B and covers the entire distance of 10 km in just 2 minutes. What would be the speed at which the particle was traveling?

$53.3 m s^{- 1}$

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$83.3 m s^{- 1}$

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$90.3 m s^{- 1}$

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$80.3 m s^{- 1}$

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Solution

The correct option is B
$83.3 m s^{- 1}$

Given, distance covered $= 10 k m = 10 \times 1000 = 10, 000 m$ .
Time taken $= 2 m i n u t e s = 2 \times 60 = 120 s$
We know, $s p e e d = \frac{d i s t a n c e}{t i m e} = \frac{10, 000}{120} = 83.33 m s^{- 1}$
$∴$ The speed at which the particle was travelling is $83.3 m s^{- 1} .$

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A particle is moving from point A to point B and covers the entire distance of 10 km in just 2 minutes. What would be the speed at which the particle was traveling?

The correct option is B 83.3 ms−1 Given, distance covered =10 km=10×1000=10,000 m . Time taken =2minutes=2×60=120 s We know, speed=distancetime=10,000120=83.33 ms−1 ∴The speed at which the particle was travelling is 83.3 ms−1.