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PhysicsNEET 2024Circular motion dynamics, banking of roads

Laws of Motion

A bob is whirled in a horizontal plane by means of a string with an initial speed of rpm. The tension in the string is . If the speed becomes while keeping the same radius, the tension in the string becomes:

  1. A.✓
  2. B.
  3. C.
  4. D.

Solution

Tension supplies the centripetal force, . Doubling the angular speed at the same radius quadruples it: .

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