Question

Current Attempt in Progress 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: ? = 17°, ?? = 2 deg/sec, ?? = 8 deg/sec², l = 10 ft, l? = 1.1 ft/sec, l? = -4.0 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 e? directions. Answers: vB = ( er + e? ) ft/sec aB = ( er + e? ) ft/sec²

          Current Attempt in Progress

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: ? = 17°, ?? = 2 deg/sec, ?? = 8 deg/sec², l = 10 ft, l? = 1.1 ft/sec, l? = -4.0 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 e? directions.

Answers:

vB = ( er + e? ) ft/sec
aB = ( er + e? ) ft/sec²

Current Attempt in Progress

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: ? = 17°, ?? = 2 deg/sec, ?? = 8 deg/sec², l = 10 ft, l? = 1.1 ft/sec, l? = -4.0 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 e? directions.

Answers:

vB = ( er + e? ) ft/sec
aB = ( er + e? ) ft/sec²

Added by Jacob L.

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