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An 8.0 kg bag of coin is being pulled upward by a rope rises 20.0 cm in 0.50 sec, starting from rest. Assuming the acceleration is constant, calculate the net force on the bag. what is the upward force on the bag exerted by the rope?

  • physics -

    The net force F is what accelerates the bag. Use F = ma to calculate it. You will need the accleration , a. For that, use
    X = 0.2 m = (1/2) a (0.5)^2

    The force exerted by the rope, f, is
    F + mg, since the net force is
    F = f - mg,

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