System of Particles and Rotational Motion - Result Question 44
47. A boy suddenly comes and sits on a circular rotating table. What will remain conserved?
(a) Angular velocity
[2002]
(b) Angular momentum
(c) Linear momentum
(d) Kinetic energy
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Answer:
Correct Answer: 47. (b)
Solution:
- (b) As net torque applied is zero.
Hence, $\tau=\frac{d L}{d t}$
$\frac{d L}{d t}=0, L=$ constant .
$L$ (angular momentum) remains conserved.
