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Question

A freight train rolls along a track with considerable momentum. If it were to roll at the same speed but had twice as much as mass, its momentum would be:


  1. Quadrupled

  2. Zero

  3. Unchanged

  4. Doubled


Solution

The correct option is D

Doubled


Since p = mv

 So p1 = (2m) × v = 2mv = 2 p

The momentum would be doubled.

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