The boom OAB pivots about point O, while section AB simultaneously extends from within section OA. Determine the velocity and acceleration of the center B of the pulley for the following conditions: θ = 19°, θ˙ = 6 deg/sec, θ¨ = 2 deg/sec2, l = 6 ft, l˙ = 2.1 ft/sec, l¨ = -3.1 ft/sec2. The quantities l˙ and l¨ are the first and second time derivatives, respectively, of the length l of section AB. Express your answers as vectors in the er and eθ directions. The boom OAB pivots about point O, while section AB simultaneously extends from within section OA. Determine the velocity andacceleration of the center Bof the pulley for the following conditions: 0- 19.0-6 deg/sec, - 2 deg/sec,I-6 ft.- 2.1 ft/sec, 73.1ft/sec?. The quantities / and / are the first and second time derivatives, respectively, of the length / of section AB. Express your answersas vectors in the e, and eg directions.27Answers:eal ft/seceal fsec?

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Answered: Determine the velocity and acceleration…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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The boom OAB pivots about point O, while section AB simultaneously extends from within section OA. Determine the velocity and acceleration of the center B of the pulley for the following conditions: θ = 19°, θ˙ = 6 deg/sec, θ¨ = 2 deg/sec², l = 6 ft, l˙ = 2.1 ft/sec, l¨ = -3.1 ft/sec². The quantities l˙ and l¨ are the first and second time derivatives, respectively, of the length l of section AB. Express your answers as vectors in the e_r and e_θ directions.

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