As shown in the figure, ball 1 with m1=4.00 kg is connected through a mass less
ID: 1982131 • Letter: A
Question
As shown in the figure, ball 1 with m1=4.00 kg is connected through a mass less rod with ball 2 with m2=3.00kg. The system is rotating at angular speed omega=8.00 rad/s about a vertical axle going through the center of the rod.(a) How far away is the center of the mass of the system from the axle?
(b) Find the kinetic energy of the system. (l=mr^2 can be directly used to calculate the rotational inertia about the axle)
(c) What is the net force on each ball? (hint: try to apply F= m(v^2/r) and the relation between omega and v)
Everyone agrees on C. No one agrees on A and B. Is it really complicated?
See last thread alone where I got THREE different answers:
http://www.cramster.com/answers-nov-11/physics/posted-times-shown-figure-ball-1-m1400-kg-connected_1755987.aspx?rec=0
Azhar Ali how did you know that is the right answer? What does take a moment mean? What moment are you taking?
Explanation / Answer
Post the figure here then I will explain you
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