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Physics · PYQ NEET UG 2019(2)
हिन्दीA person travelling in a straight line moves with a constant velocity \( v_1 \) for certain distance 'x' and with a constant velocity \( v_2 \) for next equal distance. The average velocity v is given by the relation
Correct answer · Option 3
\( \frac{2}{v} = \frac{1}{v_1} + \frac{1}{v_2} \)
Explanation
Average velocity for equal distances is the harmonic mean of the two velocities: \( v = \frac{2v_1v_2}{v_1+v_2} \), which gives \( \frac{2}{v} = \frac{1}{v_1} + \frac{1}{v_2} \).
