Created by StemPy LabSuppose the Earth spun faster and faster about its axis. Things at the equator would weigh less and less, because more of gravity's pull would be used to keep them moving in their circle. Taking the Earth's radius as and , how long would a day have to be for objects at the equator to feel weightless?
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← A block of mass 4 kg lies on a smooth horizontal table. A light string tied to it passes over a pulley at the edge of the table and holds a block of mass 2 kg, which hangs freely, as shown in the figure. The pulley is a uniform disc of mass 4 kg, and the string does not slip on it. Taking g = 10 m/s², the acceleration of the blocks, and the tensions in the horizontal and vertical parts of the string, areA metal ball hangs from a spring balance. The balance reads 2.00 N in air, 1.60 N when the ball is fully under water, and 1.68 N when the ball is fully under another liquid. The density of water is 1000 kg/m³. The density of the liquid and the density of the ball are →
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