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.

Related Questions:

1. A 5 watt source emits monochromatic light of wavelength 5000Å. When placed
2. 34 gram of water at 30⁰C is poured into a calorimeter at 15⁰C.
3. A train of mass 2x 10⁵ kg has a constant speed of 20 m/s up a hill inclined
4. If the sodium light in Young’s double slit experiment is replaced by red light
5. For a normal eye, the cornea of eye provides a converging power 40 D and the least

Topics: Motion of system of Particles and Rigid Body (73)
Subject: Physics (2479)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends