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  1. H

    Physics Paper 1

    Take one direction to be positive eg : The direction in which the particle is moving. So the initial momentum is mv. As the collision is perfectly elastic, the final velocity and initial velocity will be the same i.e. v. But, in the opposite direction. So, Final momentum = -mv Change in...
  2. H

    Phys practical help .. urgent

    You can compare the values and if they differ by 10% or more then, the theory is not supported. otherwise, it is :)
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