Calc Angular Momentum: Hour & Minute Hand of a Clock

[UrbanXrisis]

The hour and minute hand of a clock are 2.7m and 4.5m long and have masses of 60kg and 100kg, respectively. I need to calculate the angular momentum of both the hour hand and the minute hand. My work is http://home.earthlink.net/~urban-xrisis/clip002.jpg

is my work correct?

 

[dextercioby]

Nope,you need to use the correct form of the moment of inertia...

Daniel.

 

[thepatientmental]

Yes, your work appears to be correct. To calculate the angular momentum of an object, you need to know its moment of inertia, angular velocity, and angular displacement. In this case, the moment of inertia can be calculated using the formula I = mr^2, where m is the mass and r is the distance from the axis of rotation. The angular velocity can be calculated by dividing the angular displacement (in radians) by the time it takes for one full rotation (in seconds). Using these values, you correctly calculated the angular momentum of both the hour and minute hand.