SaraNextGen Study App [2022-23]
Last Updated On 23-10-2022 - By Sara

A thin uniform rod, pivoted at , is rotating in the horizontal plane with constant angular speed , as shown in the figure. At time, , a small insect starts from  and moves with constant speed  with respect to the rod towards the other end. It reaches the end of the rod at  and stops. The angular speed of the system remains  throughout. The magnitude of the torque  on the system about , as a function of time is best represented by which plot

a)b)c)d)


Question ID - 100184 :-

A thin uniform rod, pivoted at , is rotating in the horizontal plane with constant angular speed , as shown in the figure. At time, , a small insect starts from  and moves with constant speed  with respect to the rod towards the other end. It reaches the end of the rod at  and stops. The angular speed of the system remains  throughout. The magnitude of the torque  on the system about , as a function of time is best represented by which plot

a)b)c)d)

1 Answer
5876 Votes
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Answer Key : (b) -

(b)

Angular momentum about rotational axis

Torque



Next Question :

A balloon having mass  is filled with gas and is held in hands of a boy. Then suddenly it gets released and gas starts coming out of it with a constant rate. The velocity of the ejected gas is also constant (2 m/s) with respect to the balloon. Find out the velocity of the balloon when the mass of gas is reduced to half

a)

b)

c)

d)

None of these


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