Saturday

April 19, 2014

April 19, 2014

Posted by **john** on Thursday, February 23, 2012 at 3:55pm.

a)What is the average angular velocity of his arms and legs?

i got 2.09 its correct

b) Using the average angular velocity from part A, calculate the amount of rotational kinetic energy in this person's arms and legs as he walks.

Krot=? J

i solved this first ML= .37*78= 28.86kg

MA= .13*78= 10.14 kg

what do i do next im confused

C)What is the total kinetic energy due to both his forward motion and his rotation?

Ktotatl=? J

Part D) What percentage of his kinetic energy is due to the rotation of his legs and arms?

i know i have to Krot/ktotal to solve my problem

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