Physics
General
Easy

Question

A goods train is moving with constant acceleration. when engine passes through a signal its speed is U. Midpoint of the train passes the signal with speed V. What will be the speed of the last wagon?

  1. square root of fraction numerator straight V squared minus U squared over denominator 2 end fraction end root
  2. square root of fraction numerator straight V squared plus straight U squared over denominator 2 end fraction end root
  3. square root of fraction numerator 2 straight V squared minus straight U squared over denominator 2 end fraction end root
  4. square root of 2 V squared minus U squared end root

The correct answer is: square root of 2 V squared minus U squared end root

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