4. A uniform rod is free to rotate about Point A. The tram that is holding A is accelerating to the left at 4 m/s². Neglect air resistance. When the rod is in equilibrium, at what angle, 0, will the rod be oriented relative to vertical? a = 4 m/s² A 0 = ? Rod g m = 6 kg L = 0.3 m

V₂ - V₁ = 2 V₂ - V₁ = 1 3 P A modern art sculpture consists of a collar, a spring, and a circular track. The collar has a mass of m = 6 kg and the radius of the track is r = 1 m. If the spring is attached to a point P which is a vertical distance d = 0.3 m away from the perimeter of the circular track (d is measured between point 1 and point P), determine the change in potential energy between state 1 and state 2, and between state 1 and state 3. N The unstretched length of the spring is 0.15 m and the spring constant is k = 85- m UBC Engineering

2 m 3 m 0.75 m 30° 1m 60° y F The system shown is supported by journal bearings at points A, B, and C. The applied force F has a magnitude of 1000N. Take the following support reactions: •Cx=-100 N (acting in negative x-direction) Cy = -1000 N (acting in negative y-direction) • By = +750 N (acting in positive y-direction) Which of the following is closest to the magnitude of the force reaction at A in the z- direction (i.e. Az)? 身

A uniform rod of mass M = 2.3 kg and length L = 0.2 m, lying on a frictionless horizontal plane, is free to pivot about a vertical axis through one end, as shown. The moment of inertia of the rod about this axis is given by 1/3 ML2. If a force F = 7 N, q = 47° acts as shown, what is the resulting angular acceleration (in rad/s2) about the pivot point?