What is the angular momentum of an object with a mass of 7 kg that moves along a circular path of radius 12 m at a frequency of 2/3 Hz ?

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1 Answer
Jan 29, 2016

L=1344\piNs^-1

Explanation:

Angular momentum of an object is L=mvr

Given that m=7kg, r=12m and \omega=4\pi^c/3 (They had given us linear frequency, not angular frequency)

They haven't given us v directly. But, we know that v=\omegar, so let's get that into the angular momentum equation, which means
L=m\omegar^2

I'm sure you'll now understand how I got that \pi there in the answer now.