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Highly selective Backlog Qs for JEE MainPhysicsMotion in One Dimension

A car moves from X to Y with a uniform speed v_u . The average speed for this round trip is :

Options

  1. Av_u v_d
  2. Bv_d v_u v_d+v_v
  3. Cv_u+v_d 2
  4. D2 v_d v_u v_d+v_u

Correct answer

D. 2 v_d v_u v_d+v_u

Step-by-step solution

Average speed aligned & = Total distance Total time & = 2 d d V_u + d V_d = 2 V_d V_u V_d+V_u aligned

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