Problem 1. Consider the system of links depicted in Fig. 1. It is known that at...
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Problem 1. Consider the system of links depicted in Fig. 1. It is known that at the instant shown, the link DE has a constant angular velocity ofDE= 5k rad/s. Furthermore, assume that all quantities are expressed in terms of the given inertial frame, and employ the concepts of relative velocity and relative acceleration to find the numerical values of the following velocities and accelerations for the instant shown. a) Determine the linear velocity vector at point D. b) Use the result found in Part a) to determine the angular velocity vector BD of link BD. Do so by either constructing the instantaneous center of zero velocity (point C) or by expressing the velocity VB in terms of up c) Use the result found in Part b) to determine the linear velocity vector vat point B. d) Use the result found in Part c) to determine the angular velocity vector of link AB. e) Determine the linear acceleration vector ap at point D. f) Use the result found in Parte) and expressa in terms of an and a in terms of a to determine the angular acceleration vectors AB and BD of the links AB and BD, respectively. g) Use the result found in Part f) to determine the linear acceleration vector a at point B. h) Show that the linear acceleration vector af at point F, which is the midpoint between the points B and D, can be expressed as a = (aB+ aD), and determine af. D P 4 m ODE E A B 1 m 2 m 3 m 3 Figure 1: System of links with pin supports and measurements. Problem 1. Consider the system of links depicted in Fig. 1. It is known that at the instant shown, the link DE has a constant angular velocity ofDE= 5k rad/s. Furthermore, assume that all quantities are expressed in terms of the given inertial frame, and employ the concepts of relative velocity and relative acceleration to find the numerical values of the following velocities and accelerations for the instant shown. a) Determine the linear velocity vector at point D. b) Use the result found in Part a) to determine the angular velocity vector BD of link BD. Do so by either constructing the instantaneous center of zero velocity (point C) or by expressing the velocity VB in terms of up c) Use the result found in Part b) to determine the linear velocity vector vat point B. d) Use the result found in Part c) to determine the angular velocity vector of link AB. e) Determine the linear acceleration vector ap at point D. f) Use the result found in Parte) and expressa in terms of an and a in terms of a to determine the angular acceleration vectors AB and BD of the links AB and BD, respectively. g) Use the result found in Part f) to determine the linear acceleration vector a at point B. h) Show that the linear acceleration vector af at point F, which is the midpoint between the points B and D, can be expressed as a = (aB+ aD), and determine af. D P 4 m ODE E A B 1 m 2 m 3 m 3 Figure 1: System of links with pin supports and measurements.
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Related Book For
Engineering Mechanics Dynamics
ISBN: 9781118885840
8th Edition
Authors: James L. Meriam, L. G. Kraige, J. N. Bolton
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