CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Pure Rolling

a person is s...

Question

a person is standing on a rotating table with metal spheres in his outstrechedhands.if he draws his hand inwards towards his chest what will be the effect on his angular speed

Open in App

Solution

Angular speed will increase
since no external torque on system Hence angular momentum remains constant
initial angular momentum =final angular momentum
(I₁*W₂)=(I₂W₂)
Since I₂(moment of inertia) decreases due mass concentrate towards the axis of rotation (mr²⁾..
Hence W₂ increases

Suggest Corrections

thumbs-up

0

Similar questions

A man standing on a table rotating about the central axis pulls his hands holding the dumb bells towards chest. How the angular velocity will change?

Q. A man standing on a rotating table is holding two masses at arm's length. Without moving his arms, he drops the two masses. His angular speed will

Q. A man, standing on a turn-table, is rotating at a certain angular frequency with his arms outstretched. He suddenly folds his arms. If his moment of inertia with folded arms is

75 %

of that with outstretched arms, his rotational kinetic energy will

Q. A man standing on a platform holds weights in his outstretched arms. The system rotates freely about a central vertical axis. If he now draws the weights inwards close to his body,

Q. A man turns on rotating table with an angular speed

ω

. He is holding two equal masses at arms length. Without moving his arms, he just drops the two masses. How will his angular speed change?

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Rolling

PHYSICS

Watch in App

explore_more_icon

Explore more

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon