Created by StemPy LabA uniform solid sphere of radius is spun about a horizontal axis through its centre with angular speed . It is then gently placed on a rough horizontal floor, with its centre at rest. At first it slips, and friction acts on it. After some time it starts to roll without slipping. The speed of its centre at that moment is
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← Sand falls vertically onto a horizontal conveyor belt at a steady rate of 2 kg/s, as shown in the figure. The belt moves at a constant speed of 3 m/s, and the sand is carried along with it. Ignore friction in the rollers. The extra force needed to keep the belt moving at a steady speed, and the extra power the motor must supply, areA thin uniform spherical shell has mass M and radius R. Which graph correctly shows the gravitational potential V against the distance r from the centre of the shell? →
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