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A particle covers half of its total distance with speed v1 and the rest half distance with speed v2. Its average speed during the complete journey is
Options
(a) (v1v2)/(v1+v2)
(b) (2v1v2)/(v1+v2)
(c) (2v1²v2²)/(v1²+v2²)
(d) (v1+v2)/2
Correct Answer:
(2v1v2)/(v1+v2)
Explanation:
Let the tot. distance covered by the particles be 2s. Then
vₐᵥ = 2 s / (s/ v₁ + s/ v₂) = 2 v₁v₂ / v₁ + v₂
Related Questions: - A source of sound S emitting waves of frequency 100 Hz and an observer
- The velocity of electromagnetic radiation in a medium of permittivity ε₀
- A uniform plank of Young’s modulus Y is moved over a smooth horizontal surface
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Topics: Motion in Straight Line
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A source of sound S emitting waves of frequency 100 Hz and an observer
- The velocity of electromagnetic radiation in a medium of permittivity ε₀
- A uniform plank of Young’s modulus Y is moved over a smooth horizontal surface
- A small oil drop of mass 10⁻⁶kg is hanging in at rest between two plates seperated
- If threshold wevelength for sodium is 6800 Å, the work function will be
Topics: Motion in Straight Line (93)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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