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  1. PhysicsDoc

    Physics, Chemistry and Biology: Post your doubts here!

    Call the tensions in the two wires A and B newtons respectively. Take moments about one of the points where the wire is attached to the beam. If this is where the A force acts, then its moment will be zero and you can apply the principle of moments to find B. Once you have B you can simply...
  2. PhysicsDoc

    Physics: Post your doubts here!

    Surely you will need to take into account the changing mass of the rocket. In this case Newton's Law becomes F = d/dt(mv), the reducing mass of the rocket will imply an increasing value of v since momentum must be constant as force is constant.
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