An engine of a train, moving with uniform acceleration, passes the signal-post with velocity u and the last…

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 :
  1. u+v2
  2. v2+u22
  3. v-u2
  4. v2-u22

Solution

v'2=u2+2ad

v2=v'2+2ad

solving, we get

v'=v2+u22

Asked in: JEE Main 2021 (25 Feb Shift 1)

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