Question

एक व्यक्ति दोनों हाथ फैलाकर घूमती हुई मेज
पर खड़ा है। अचानक वह अपने हाथों को भीतर
की ओर सिकोड़ लेता है, उसका कोणीय वेग-​

Answer 1

Answer:

The angular speed will increase as the man will fold his hand inwards

Explanation:

As we know that there is no external torque on the system of man + table system

So here we can say that angular momentum of the system will remain conserved

so we will have

$I_1\omega_1 = I_2\omega_2$

so we have

$\omega_2 = \frac{I_1}{I_2}\omega_1$

Now when man fold his hand inward so its moment of inertia will decrease than initial value

so we will have

$I_1 > I_2$

now we will say

$\omega_2 > \omega_1$

so angular speed will increase as the man will fold his hand inwards.

#Learn

Topic : Angular momentum conservation

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