The spool is supported on rollers A and B which rotate without friction. By exerting a force T= 350N, calculate the time to unwind 4m of cable, if it has m=600kg and ko= 1.2m (1=1/2*m*ko²). Neglect the mass of the cable being unwound and the mass of the rollers. 1 30° -1.5m0.8 m 0 -1m-

During a bicep curl exercise, the biceps generate 800 N of force with a moment arm of 0.03 m. If the lever arm for the hand weight is 0.2 m (i.e. d), which of the following weights would result in an eccentric contraction? % O 120 N O 100 N O 200 N O 15 N @ 1 1 18 5 T 16 6 17 & Y # f8 * U C hp 8 fg 144 9 f10 O ? f11 74°F F12 P

22) A rod of mass 20kg of length L = 60m is mounted a distance L/4 from its left edge. It is held in rotational equilibrium by two ropes. Rope 1 has T1 = 40N. The second rope makes an angle of 30° with the rod. A person of mass 40kg stands at a distance L/4 from the left edge. What is T2? T2 T1 L/4

I just want to make sure that I am doing this question correctly and also the answer is 155N. Moment on left side = Moment on right side. 10kg*10m=100 6kg*4m=24 100+24=124 124/8m= 15.5N 15.5*10m/s 2 gravity = 155N

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4. Suppose a light cable is wrapped around a solid cylinder with mass 50Kg and diameter 0.12m. The cylinder rotates with no friction about a stationary horizontal axis. The free end of the cable is pulled by a force of 9N over a distance of 2m. What is the speed of the cylinder? 9.0 N 2.0 m 50 kg 0.120 m

A thin cord is wrapped around a uniform grindstone of radius 0.30 m and mass of 25 kg supported by bearings that produce negligible friction torque. The cord exerts a steady tension force on the grindstone, causing it to accelerate from rest to 60 rad/s in 12 s. (lgrindstone = 5 What is the magnitude of the tension force of the cord? O 5.6 N 11.3 N O 18.7 N O 37.5 N

A 4 kg cat sits on a 30 kg, 4 m long beam that is supported by a cable. She sits 0.5 m in from the right, and the cable is supporting the beam at a point 1 m in from the left.  The beam is free to rotate at the hinge.  What is the tension in the cable and horizontal and vertical forces exerted by the hinge?  What direction do the vertical and horizontal forces point?

Fg 120000 N FA+FB 165000 %3D FA+120000= 165000 FA=45000 N Ex : What is the value of the force (F) required to balance the system in the figure? M = 5 kg and F makes and angle (0 =37°) below 3 m 2 m OM Answer: ET about center 0 ITMl+ITpl 0 %3D 71Page

1:51 kık- M A A .content.blackboardcdn.com 5 46 Chapter 2 Problems 2.14 A box weighing 25 pounds (assumed concentrated at its center of gravity) is being pulled by a horizontal force F equal to 20 pounds. What is the moment about point A? Does the box tip over? 2.15 A large wood beam weighing 800 N is supported by two posts as shown. If an unthinking man weighing 700 N were to walk on the overhang portion of the beam, how far can he go from point A before the beam tips over? (Assume the beam is resting on the two supports with no physical connection.)