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JEE Main20249 Apr 2024Morning ShiftPhysicsMotion in One DimensionActual

A particle moving in a straight line covers half the distance with speed 6 ~m / s . The other half is covered in two equal time intervals with speeds 9 ~m / s and 15 ~m / s respectively. The average speed of the particle during the motion is :

Options

  1. A10 ~m / s
  2. B8 ~m / s
  3. C9.2 ~m / s
  4. D8.8 ~m / s

Correct answer

B. 8 ~m / s

Step-by-step solution

aligned & BD S =9 t +15 t =24 t & AB S =6 t ₁=24 t t ₁=4 t & aligned & = dist. time = 48 t 2 t + t ₁ & = 48 t 2 t +4 t 48 t 6 t 8 ~m / s aligned aligned

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