Created by StemPy LabA uniform rod of mass and length is hinged at one end to a fixed frictionless pivot, so that it can turn in a vertical plane. The rod is held horizontal and then released from rest. The magnitude of the force exerted by the hinge on the rod at the instant just after release is
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← The potential energy of a particle that moves along the x-axis is U(x) = 3x² - 2x³, where U is in joules and x is in metres. Each graph in the options shows a curve of force against position, with one point marked S as the point of stable equilibrium. Which graph correctly shows the force F on the particle and the right point of stable equilibrium?A satellite orbiting just above the surface of the Earth has a period of about 84 min. Another planet is also a uniform sphere, but its mean density is three times that of the Earth, and its radius is different from the Earth's. The period of a satellite orbiting just above the surface of this planet is closest to →
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