BIO Deltoid Muscle A crossing guard holds a STOP sign at arm’s length, as shown in Figure 11-63. Her arm is horizontal, and we assume that the deltoid muscle is the only muscle supporting her arm The weight of her upper arm is W u = 18 N, the weight of her lower arm is W 1 = 11 N, the weight of her hand is W h = 4.0 N, and the weight of the sign is W s = 8.9 N. The location where each of these forces acts on the arm is indicated in the figure A force of magnitude f d is exerted on the humerus by the deltoid, and the shoulder joint exerts a force on the humerus with horizontal and vertical components given by f x and f y respectively. (a) Is the magnitude of f x greater than less than or equal to the magnitude of f x ? Explain. Find (b) f d , (c) f x and (d) f y (The weights in Figure 11-63 are drawn to scale; the unknown forces are to be determined. If a force is found to be negative, its direction is opposite to that shown )
BIO Deltoid Muscle A crossing guard holds a STOP sign at arm’s length, as shown in Figure 11-63. Her arm is horizontal, and we assume that the deltoid muscle is the only muscle supporting her arm The weight of her upper arm is W u = 18 N, the weight of her lower arm is W 1 = 11 N, the weight of her hand is W h = 4.0 N, and the weight of the sign is W s = 8.9 N. The location where each of these forces acts on the arm is indicated in the figure A force of magnitude f d is exerted on the humerus by the deltoid, and the shoulder joint exerts a force on the humerus with horizontal and vertical components given by f x and f y respectively. (a) Is the magnitude of f x greater than less than or equal to the magnitude of f x ? Explain. Find (b) f d , (c) f x and (d) f y (The weights in Figure 11-63 are drawn to scale; the unknown forces are to be determined. If a force is found to be negative, its direction is opposite to that shown )
BIO Deltoid Muscle A crossing guard holds a STOP sign at arm’s length, as shown in Figure 11-63. Her arm is horizontal, and we assume that the deltoid muscle is the only muscle supporting her arm The weight of her upper arm is Wu = 18 N, the weight of her lower arm is W1 = 11 N, the weight of her hand is Wh = 4.0 N, and the weight of the sign is Ws = 8.9 N. The location where each of these forces acts on the arm is indicated in the figure A force of magnitude fd is exerted on the humerus by the deltoid, and the shoulder joint exerts a force on the humerus with horizontal and vertical components given by fx and fy respectively. (a) Is the magnitude of fx greater than less than or equal to the magnitude offx? Explain. Find (b)fd, (c)fx and (d)fy (The weights in Figure 11-63 are drawn to scale; the unknown forces are to be determined. If a force is found to be negative, its direction is opposite to that shown )
A planar double pendulum consists of two point masses \[m_1 = 1.00~\mathrm{kg}, \qquad m_2 = 1.00~\mathrm{kg}\]connected by massless, rigid rods of lengths \[L_1 = 1.00~\mathrm{m}, \qquad L_2 = 1.20~\mathrm{m}.\]The upper rod is hinged to a fixed pivot; gravity acts vertically downward with\[g = 9.81~\mathrm{m\,s^{-2}}.\]Define the generalized coordinates \(\theta_1,\theta_2\) as the angles each rod makes with thedownward vertical (positive anticlockwise, measured in radians unless stated otherwise).At \(t=0\) the system is released from rest with \[\theta_1(0)=120^{\circ}, \qquad\theta_2(0)=-10^{\circ}, \qquad\dot{\theta}_1(0)=\dot{\theta}_2(0)=0 .\]Using the exact nonlinear equations of motion (no small-angle or planar-pendulumapproximations) and assuming the rods never stretch or slip, determine the angle\(\theta_2\) at the instant\[t = 10.0~\mathrm{s}.\]Give the result in degrees, in the interval \((-180^{\circ},180^{\circ}]\).
What are the expected readings of the ammeter and voltmeter for the circuit in the figure below? (R = 5.60 Ω, ΔV = 6.30 V)
ammeter
I =
simple diagram to illustrate the setup for each law- coulombs law and biot savart law
Human Physiology: An Integrated Approach (8th Edition)
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