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NEET UG PHYSICS MCQ: MOTION IN A STRAIGHT LINE

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A motor vehicle travelled the first one third of a distance ‘S ’ at a speed of

{V_1} = 10\,kmph

, the second one third at a speed of

{V_2} = 20\,kmph

and the last one third at a speed of

{V_3} = 60\,kmph

determine the mean speed of the vehicle over the entire distance ‘S ’

View answer and explanation

Correct option: D

18 kmph

Option D (18 kmph) is correct because it is the harmonic mean of the three speeds, calculated appropriately for equal distances.

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