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JEE Main202125 Feb 2021Morning ShiftPhysicsMotion in One DimensionActual

An engine of a train, moving with uniform acceleration, passes the signal-post with velocity u and the last compartment with velocity v . The velocity with which middle point of the train passes the signal post is :

Options

  1. Au + v 2
  2. Bv 2 + u 2 2
  3. Cv - u 2
  4. Dv 2 - u 2 2

Correct answer

B. v 2 + u 2 2

Step-by-step solution

v ' 2 = u 2 + 2 a d v 2 = v ' 2 + 2 a d solving, we get v ' = v 2 + u 2 2

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