Question

A rod of length 2 m is pivoted at one end A and freely rotated in
horizontal plane at an angular velocity of 6 rad s=1, about vertical axis
passing point A. Suddenly temperature of system is increased by 200°C.
The percentage change in its angular speed is nearly
(a = 3 x 10-4K-1)

18.6%
41%
12%
36%
​

Answer 1

Answer:

☆rod length will change after temperature increases due to molecular expansion.

Refer the attachment for solution.

Your answer is 12%

☆reasons for angular speed change-

• as temperature increase rod length increases by which mass get more distributed from the axis
• which results in increase of moment of inertia
• as angular momentum is conserved...so to counter the effect of inertia omerga gets decreases
• as angular momentum L=IW(W is omega)

Hope it helps!!

Answer 2

OPTION 3) RIGHT ANSWER :)❤