. A thin rectangular plate is acted upon by 4 forces as shown. The 200 N makes an angle of 30 degrees with the horizontal.
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- A box weighing 450N is being pulled at an angle of 38 degrees along a level floor. If the force applied by the rope is 260N, what is the normal force experienced by the box (assume equilibrium)?Calculate the force (in N) a piano tuner applies to stretch a steel piano wire 8.10 mm, if the wire is originally 0.850 mm in diameter and 1.35 m long.In the figure 20.0 kg boom of length 4.00 m is supported by a cable that has a breakingtension of 1000 N. The cable is perpendicular to the boom and is attached 3.00 m from thepivot. Find: (a) the maximum load that can be suspended from the end of the boom; (b) thehorizontal and vertical forces exerted by the pivot in this case.
- A uniform 30-lb beam, 10 feet long is carried by two mean A and B, one at each end of the beam. a) If A exerts a force of 25 lbs, where must a load of 50 lbs be placed on the beam? b) What force does B exert? ( Complete Solution)The rectangular framework is subjected to the following non-concurrent system of forces: a 30lb- force below the origin, a 20lb-force 3ft above the origin and making an angle of 30°NE, a 100lb-force with a horizontal distance of 3ft and a vertical distance of 4ftfrom the origin and making an angle of 45° NW, a 60lb force with the same distance like the previous force but along the positive x-axis, and a 100lbs force 4ft to the right of the origin and making an angle of 60° SW. Determine the magnitude and direction of the resultant, as well as its moment arm relative to the origin.We analyzed the biceps muscle example with the angle between forearm and upper arm set at 90 degree (see figure below). Find the force exerted by the biceps muscle when the angle is 150 degree and the forearm is in a downward position. (Assume that r_1 = 5.0 cm, r_2 = 12 cm, r_3 = 30 cm, m_a = 2.4kg, and m_b = 4.2 kg. Enter the magnitude.) N
- A communications tower is located at the top of a steep hill, as shown. The angle of inclination of the hill is 62°. A guy wire is to be attached to the top of the tower and to the ground, 163 ft downhill from the base of the tower. The angle formed by the guy wire is 10°. Find the length of the cable required for the guy wire..A 2m crowbar is employed to lift a 200 kg load. What force must the man apply to one end of the crowbar when stone (acting as a fulcrum) is placed under the crowbar 20cm away from the end on which the load rests? Neglect the weight of the crowbar.
- Please help meTwo builders carry a sheet of drywall up a ramp. Assume that W = 2.10 m, L = 3.20 m, 0 = 25.0°, and that the lead builder carries a (vertical) weight of 187.0 N (42.0 lb). What is the (vertical) weight carried by the builder at the rear? The builder at the rear gets tired and suggest that the drywall should be held by its narrow side. What is the weight (in N) he must now carry?If the fibers of a pennate muscle are oriented at a 43° angle to a central tendon, howmuch tension is produced in the tendon when the muscle fibers contract with 1600 N offorce?