A crowbar of length 45 cm is used to lift up a rock weighing 16 kg from the ground, if the fulcrum is 5cm from the rock, what is the effort needed.
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Fleming's Left-Hand Rule is a simple and accurate way to find the direction of force/motion of the conductor in an electric motor when the magnetic field direction and the current direction are known. It was originally developed by John Ambrose Fleming, an English electrical engineer, in the late
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