Created by StemPy LabA light string runs over a smooth, light pulley. How does the tension compare on the two sides of the pulley?
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← A picture of mass 3.0 kg hangs from a wire over a nail. Each half of the wire makes 60° with the vertical. Taking g = 9.8 m/s², what is the tension in the wire?For a uniform Earth, the potential at the centre is -3GM/2R. By how much is the potential at the surface higher than at the centre? (g = 9.8 m/s², R = 6.4 × 10⁶ m.) →
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