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: . The Quantities Andare The First And Second Time Derivatives, Repectively, Of The Length L Of Section AB.

 

 

 

217/37 37 The boom OAB pivots about point O, while section AB simultaneously extends from within section bopqa OA. Determine the velocity and acceleration of the center B of the pulley for the following conditions: 0 = 20, = 5 deg/sec, i l - 0 = 2 deg/sec, 1 = 7 ft, 1.5 ft/sec, = -4 ft/sec. The quantities / and are the first and second time derivatives, respec- tively, of the length / of section AB. 24' 000 a b B A Problem 2/137