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Three masses are connected by rigid massless rods, as shown. The 200-g mass (B) is located...


Three masses are connected by rigid massless rods, as shown. The 200-g mass (B) is located at the origin (0, 0).  

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(a) Find the x- and y-coordinates of the center of mass.  

(b) Find the moment of inertia of this system of three connected masses when rotated about the r-axis that passes through mass B?  

(c) If this system is rotated about the r-axis, from rest to an angular speed of 6 rad/s in time t = 3 s, what is the angular acceleration of the system?  

(d) What is the magnitude of the net torque applied to this rotating system in order to cause the angular acceleration calculated in part (c) above?  

(e) Calculate the rotational kinetic energy of the rotating system about the z-axis when it rotates at an angular speed of 5 rad/s.

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