Recent content by Johnny_99

  1. J

    How can I determine the magnification of a lens?

    I do not know where to ask this question: For a lens (converging or Diverging), How do i know if magnification is positive or negative?
  2. J

    How Fast Will Box A Hit the Floor in a Pulley System?

    what is that? what does U stand for Dorothy?
  3. J

    How Fast Will Box A Hit the Floor in a Pulley System?

    Homework Statement Two boxes are connected over a pulley and hel AT REST. Box A has a mass of 15kg and box B has a mass of 12kg. If the bottom of box A is originally 85cm above the floor, with what speed will it contact the floor when the system is released? Use conservation of energy and...
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