Problem #6 The figure below shows a bead of mass m that is free to slide with friction along a guide that is hinged at its left end. The bead starts from rest at distance L from the hinge. Undergraduate Dynamics Problem The angle 0(1) = wt is indicated The guide is slowly lifted so that the angle between the guide and the positive horizontal is 0(t) = wt. a.) determine the equation of motion for the bead using the distance the bead is from the hinge as the generalized coordinate r. b.) M0) = 0. c.) (no friction), w = 0. 1 rad/sec, L = 2 m and g = 9.8 m/s³. Assuming that the kinetic friction (K = urN) always acts upward along the rod, Solve the equation exactly assuming the initial conditions: r(0) = L and Determine the time when the bead hits the hinge assuming the inputs µx - 0

5. Request edit access A person is holding a stick by one end. A mass of 1000 g is hung from the stick. Each stick is identical, but the distance that the mass is hung and the angle at which the mass is hung is different in each case. Ignore the mass of the stick. I A B 1/2 30% C D E 60° 450 Rank the difficulty of holding the meter stick from the left end in the position shown. OR 2 3 Greatest Explain your reasoning. 5 All Least the same All zero Cannot determine Extra Credit

Please draw the free diagram clear and also indicate if we need to add force

15° Deltoid 17 cm 38 cm A worker is holding his arm straight out parallel to the ground as he grabs a tool. His arm is perfectly straight. Use the information given in the picture and below to solve problem 3. a) Draw and label the free body diagram of all forces on the shoulder b) Calculate the force of the deltoid using the sum of the moments. c) Find the vertical reaction force of the shoulder. Is it acting "up" or “down" d) If the maximum tensile force of the deltoid muscle is 1000 [N], what is the maximum weight of a tool that the worker can carry in this exact position? Weight of the arm = 2.5[kg] Weight in the hand (tool) = 2[kg]