Question 11 of 14 <> A bucket crane consists of a uniform boom of mass M = 201 kg and length L = 59.33 ft that pivots at a point on the bed of a fixed truck. The truck supports an elevated bucket with a worker inside at the other end of the boom, as shown in the figure. The bucket and the worker together can be modeled as a point mass of weight 201 lb located at the m end point of the boom. M Suppose that when the boom makes an angle of 66.1° with the horizontal truck bed, the bucket crane suddenly loses power, causing the bucket and boom to rotate freely toward the ground. Find the magnitude of the angular acceleration Ja| of the system just after the crane loses power. Take the rotation axis to be at the point where the boom pivots on the truck bed. Use g = 9.81 m/s? for the acceleration due to gravity. For unit conversions, assume that 1 m = 3.28 ft and 1 lb = 4.45 N. Express your answer to at least two

Question 11 of 14 <> A bucket crane consists of a uniform boom of mass M = 201 kg and length L = 59.33 ft that pivots at a point on the bed of a fixed truck. The truck supports an elevated bucket with a worker inside at the other end of the boom, as shown in the figure. The bucket and the worker together can be modeled as a point mass of weight 201 lb located at the m end point of the boom. M Suppose that when the boom makes an angle of 66.1° with the horizontal truck bed, the bucket crane suddenly loses power, causing the bucket and boom to rotate freely toward the ground. Find the magnitude of the angular acceleration Ja| of the system just after the crane loses power. Take the rotation axis to be at the point where the boom pivots on the truck bed. Use g = 9.81 m/s? for the acceleration due to gravity. For unit conversions, assume that 1 m = 3.28 ft and 1 lb = 4.45 N. Express your answer to at least two

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter5: Three-dimensional Equilibrium

Section: Chapter Questions

Problem 5.2P: Draw the FBD for the bar described in Prob. 5.1 if the bar is homogeneous of mass 50 kg. Count the...

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Question 3) The position of the head and neck and the forces acting on the head are shown in the figure. The center of gravity of the head of mass m=8 kg is located at point C. Neck muscle strength of FM=130 N, which makes an angle of γ=65° with the vertical from the B point to the skull, is affected by the neck extensor muscles. The center of the atlantooccipital joint is located at point B. For this flexion position of the head, the FJ joint reaction force, which makes an α angle with the horizontal from point A, acts. (Take the gravitational acceleration g as 9.81 m/s2). Accordingly; a) Calculate the angle α of the FJ joint reaction force with the horizontal. Response b) Calculate the FJ joint reaction force. (Write your result in N.) Answer
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