4. The uniform circular disk with the three components of angular velocity w₁ = 3 rad/s, w25 rad/s, w3 = 8 rad/s is shown in Figure 4. Determine the kinetic energy T and the angular momentum Ho with respect to O of the disk for the instant represented when the x-y plane coincides with the X-Y plane. The mass of the disk is m = 10 kg. Y W2 W1 Z y x-X B W3 Figure 4: Uniform rotary circular disk

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Rod OA rotates counterclockwise at a constant angular rate 0-4 rad/s. The double collar B is pin-connected together such that one collar slides over the rotating rod and the other collar slides over the circular rod described by the equation r= (1.6 cos 6) m. Both collars have a mass of 0.65 kg. Motion is in the vertical plane. (Figure 1) Figure r=1.6 cos 9. 0-4 rad/s 0.8 m 1 of 1 Part A Determine the magnitude of the force which the circular rod exerts on one of the collars at the instant 0=45 Express your answer to three significant figures and include the appropriate units. ▸ View Available Hint(s) F= Value Submit μÁ Part B Previous Answers Units X Incorrect; Try Again; 5 attempts remaining Determine the magnitude of the force that OA exerts on the other colar at the instant @-45. Express your answer to three significant figures and include the appropriate units. View Available Hint(s)

)= The disk with radius r is rolling (without slipping) with angular velocity @ through the bottom of the circular path of radius R. If @= 2 rad/sec, R = 0.5 m, r = 0.2 m, and the mass of the disk is 3 kg, calculate the magnitude of the normal force exerted by the path on the disk at that instant. Present your answer in Newtons using 3 significant figures. wwwww