Solve and show working/ reasoning

5 . For the wheel-and-axle system shown above, which of the following expresses the condition required for the system to be in static equilibrium? (A) m, = mz (B) am, = bm2 (C ) am 2 = bm , ( D ) a 'm , = b' m' SECTION B - Rotational Kinematics and Dynamics 1 . A uniform stick has length L. The moment of inertia about the center of the stick is I.. A particle of mass M is attached to one end of the stick. The moment of inertia of the combined system about the center of the stick is (A) (B) ( D ) 10 + MI ? -e - - 21 3Mo Pivot A light rigid rod with masses attached to its ends is pivoted about a horizontal axis as shown above. When released from Mo 2. Point rest in a horizontal orientation, the rod begins to rotate with an angular acceleration of magnitude g g (A) 71 8 (B) 51 5g (C) 41 (D) 71 3. In which of the following diagrams is the torque about point O equal in magnitude to the torque about point X in the AF diagram above? (All forces lie in the plane of the paper.) (A) (B) 2F (C) (D) 160.2F 30%