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MAE-2102 Key Problems Unit #2 Kinematics & Kinetics of Rigid Bodies Chapter 19 1. Gear A has a mass of 60 kg and a radius of gyration kC=160mm. Gear B has a mass of 25 kg and a radius of gyration kD =125 mm. If a motor supplies a torque having a magnitude M=(1.2t) N*m, where t is in seconds, to gear A, determine the angular velocity of gear B in 3 s. Initially, gear A is rotating at ω1=2 rad/s. (Hint: The linear velocity of the point where both gears meet is a constant.) Chapter 19 2. A thin rod of mass m has an angular velocity ω0 while rotating on a smooth surface. Determine its new angular velocity just after its end strikes and hooks onto the peg and the rod starts to rotate about P without rebounding. Solve the problem (a) using the parameters given, (b) setting m=2 kg, ω0=4 rad/s, l=1.5 m. R. Gist 1 Ver. A, Rev. 1