Overview
Precession can be demonstrated effectively through a spinning top. If a spinning top is placed on a flat surface near the surface of the Earth at a vertical angle and is not spinning, it will fall over due to the force of gravity producing a torque acting on its center of mass. However, if the top is spinning on its axis, it precesses about the vertical direction, rather than topple over due to this torque. Precessional motion is a combination of a steady circular motion of the axis and the spin motion of the top about the axis. The torque produced due to the spinning top is perpendicular to the angular momentum; thus, the direction of the torque changes, but its magnitude does not. The top precesses around a vertical axis since the torque is always horizontal and perpendicular to the angular momentum. If the top is not spinning, it acquires angular momentum in the direction of the torque, and it rotates around a horizontal axis, falling over just as expected.…
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How to embed a video
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STEP 2: PASTE THE EMBED CODE INTO YOUR ENVIRONMENT
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