Assume: The small objects are point particles. The system of seven small 2 kg objects is rotating at an angular speed of 9 rad/s. The objects are connected by light, flexible spokes that can be lengthened or shortened.

A) What is the initial angular momentum of the object?

B)What is the new angular speed if the spokes are shortened from 9 m to 6 m ?

C)What is the new angular momentum of the object?

a) , b) , c)

Explanation:

The angular momentum of a system of particles rotating around an axis is:

a) The previous expression can be simplified to find the initial angular momentum:

b) The new angular speed is calculated from the Principle of Angular Momentum Conservation, since there are no external forces influencing over the system:

c) The angular momentum remains constant, since there is no information that indicates the presence of external forces influencing the system.

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explanation: