Part A Each Blade On A Wind Turbine Is Engineered To Produce An Effective Force Through Its Center Of Mass That Is Perpe 1 (157.98 KiB) Viewed 27 times
Part A Each blade on a wind turbine is engineered to produce an effective force through its center of mass that is perpendicular to its long axis. (Figure 1) The magnitude of the force produced by each blade in a wind of speed vis F= (40.0 kg/s)v. If the center of mass of each blade is r = 10.0 m, what is U1, the total work done by the wind turbine's blades, in a wind of speed v = 3.05 m/s after 10 revolutions? Express your answer numerically in joules to three significant figures. Learning Goal: To be able to calculate the work done by a couple on a rigid body When a body subjected to a couple moment, M, undergoes general planar motion, the two couple forces do work only when the body undergoes a rotation. When the body rotates in the plane through a finite angle measured in radians) from 0 to 62, the work of a couple is UM= = Set? M If the couple moment, M, has a constant magnitude, then the work is reduced to View Available Hint(s) Pa| ΑΣΦη vec U1 = J UM=M(02-04) Submit Figure Part B 1 of 2 A brake system is tested by rotating a tire and measuring the number of rotations required for the brake system to bring the tire to a stop. (Figure 2) The tire's radius is R = 50.0 cm and the brake system's radius is r = 19.8 cm A moment of M = 21.0 N·m is applied to the tire for 5 rotations before the brake system is applied. The brake system is composed of two pads that are pushed out against the drum with a force that increases as the tire rotates and is described by F = (10.00) N. If the coefficient of kinetic friction between the brake pads and the outer ring of the brake system is pk = 0.550, how many rotations, n, will the tire go through before coming to a stop? Express your answer numerically to three significant figures. F View Available Hint(s) IVO ALOIt vec ? n = Pearson
Part A Learning Goal: To be able to calculate the work done by a couple on a rigid body When a body subjected to a couple moment, M. undergoes general planar motion, the two couple forces do work only when the body undergoes a rotation. When the body rotates in the plane through a finite angle (measured in radians) from 0 to 62, the work of a couple is Each blade on a wind turbine is engineered to produce an effective force through its center of mass that is perpendicular to its long axis. (Figure 1) The magnitude of the force produced by each blade in a wind of speed vis F= (40.0 kg/s) v. If the center of mass of each blade is r = 10.0 m, what is U1, the total work done by the wind turbine's blades, in a wind of speed v = 3.05 m/s after 10 revolutions? Express your answer numerically in joules to three significant figures. View Available Hint(s) -02 Um = S M de EVO AEQ I vec ΑΣφ 1) ? If the couple moment, M, has a constant magnitude, then the work is reduced to U1 = J UM=M(02-01) Submit Figure Part B < 2 of 2 > brake pads M A brake system is tested by rotating a tire and measuring the number of rotations required for the brake system to bring the tire to a stop. (Figure 2) The tire's radius is R = 50.0 cm and the brake system's radius is r = 19.8 cm A moment of M = 21.0 N·m is applied to the tire for 5 rotations before the brake system is applied. The brake system is composed of two pads that are pushed out against the drum with a force that increases as the tire rotates and is described by F= (10.00) N. If the coefficient of kinetic friction between the brake pads and the outer ring of the brake system is Hk = 0.550, how many rotations, n, will the tire go through before coming to a stop? Express your answer numerically to three significant figures. View Available Hint(s) R IVO AXO 11 vec 1) ? tire drum n =
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