Navigate

If a gymnast, sitting on a rotating stool with his arms outstretched, suddenly

If a gymnast, sitting on a rotating stool with his arms outstretched, suddenly lower his hands, then

Options

(a) The angular velocity decreases
(b) His moment of inertia decreases
(c) The angular velocity stays constant
(d) The angular momentum increases

Correct Answer:

The angular momentum increases

Explanation:

A gymnast sitting on a rotating stool with his arms outstretched. Suddenly when he lower his hands his moment of inertia I decreases. Since his angular momentum Iω remains constant and I decreases, his angular velocity ω increases.

BHU2007
admin:

View Comments (1)

  • The angular momentum increases because it depends on radius.Here when he lowers his hand the radius increases.

Leave a Comment

Related Questions

  1. An α-particle of energy 5 MeV is scattered through 180⁰ by a fixed uranium nucleus.
  2. In a nuclear reactor, the number of U²³⁵ nuclei undergoing fissions per second
  3. To get three images of single object, one should have two plane mirrors at an angle of
  4. The intensity at the maximum in a Young’s double slit experiment is I₀.
  5. Electrons in a certain energy level n=n₁, can emit 3 spectral lines. When they