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September 16, 2014

September 16, 2014

Posted by **Amber** on Wednesday, April 25, 2012 at 12:18am.

Find the angular momentum of the system about their center of mass.

Answer in units of J · s

Find the total kinetic energy of the system.

Answer in units of J

- Physics. PLEASE HELP!! -
**Damon**, Wednesday, April 25, 2012 at 2:10amThese are pretty crazy measurements for human ice skaters but anyway

w = 2 pi/7.6 = .827 radians/second

find center of mass at x from big one

x(50)=(4.6-x)(15)

50 x = 69 - 15 x

65 x = 69

x = 1.06 m from big one and 3.54 from little one

I = 50(1.06)^2 + 15(3.54)^2

= 244 kg m^2

L = ang momentum = I w

= 244 (.827)

= 202 kg m^2/s

- Physics. PLEASE HELP!! -
**Cesar**, Wednesday, April 25, 2012 at 12:20pmfor KE

since you already have all the numbers...

KE1 + KE2 = (.5*I1*W1^2) + (.5*I2*W2^2)

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