JEE Main Physics question

When a man stands on a turn-table stretching with two equal loads in hand and rotates. Then he folds his arms. Which of the following statements is correct?

(A)Linear momentum is conserved
(B)Kinetic energy increasesCorrect
(C)Angular momentum increases
(D)Angular velocity increasesCorrect

Answer: (B),(D)

Solution

With no external torque, angular momentum stays constant (so (C) is false), while folding the arms reduces . Since

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-159040