Physics 101- Introduction to Mechanics
April 17- Angular Momentum

A child swings a 0.1 kg ball on a string around in a horizontal circle of radius 2.0 m once every 0.63 s.  The ball's angular momentum around the child is
• 0.63 kg·m2/s
• 2.0 kg·m2/s
• 4.0 kg·m2/s
• 10 kg·m2/s
• 20 kg·m2/s
• other

•

You are standing 30 m due east of a 50 kg person who is running at a speed of 2.0 m/s due west.  What is the magnitude of that person's angular momentum around you?
a. 3000 kgm2/s
b. 1000 kgm2/s
c. 300 kgm2/s
d. 100 kgm2/s
e. zero
f. other

You are standing 30 m due east of a 50 kg person who is running at a speed of 2.0 m/s due north.  What is the magnitude of that person's angular momentum around you?

a. 3000 kgm2/s
b. 1000 kgm2/s
c. 300 kgm2/s
d. 100 kgm2/s
e. zero
f. other
g. it's the same problem as before

Estimate the angular momentum associated with the Earth's rotation about its axis.

Estimate the angular momentum associated with the Earth's orbital motion about the sun.

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 Jeff Phillips phillips@lmu.edu Loyola Marymount University Spring 2002