Question
What is the magnitude of the angular momentum, about Earth’s center, of an 84 kg person...
What is the magnitude of the angular momentum, about Earth’s center, of an 84 kg person on the equator due to the Earth’s rotation?
Homework Answers
Answer #1
Mass of a person m = 84 kg
Radius of earth R = 6.37 x10 6 m
Period of earth in its own axis T = 24 hrs
= 24 x 60 x 60 s
Angular speed of earth 
= 7.272 x10 -5 rad / s
Angular momentum L = mvR
= m(R
) R
= mR
2
Substitute values you get L = 84 kg x (7.272 x10 -5 rad / s)(6.37 x10 6 m ) 2
= 2.478 x10 11 kg m 2 / s
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