Can you solve problem 2 Problem Set 8-Fall 2018 TTU-x Duelingbook My Grades Blac

Question

Can you solve problem 2

Problem Set 8-Fall 2018 TTU-x Duelingbook My Grades Blackboard Help TTU Student Services TTU Student Disability i https://ttu.blackboard.com/webapps/blackboard/execute/content/file?cmd=view&content_id3914737-1&course-id--57613-1 TTU Libraries Home Problem Set 8 (Due Thursday, September 27) Problem 1. Two elevator systems are shown below, one without a counterweight, C, and Title IX Syllabus Statement the other with one. For each system, determine the power the motor, M, must output to lift the elevator (a) at a constant speed of v 3-, (b) at a speed v 3 with an upward acceleration a 1 and (c) at a speed v 3 with a downward acceleration a1 The elevator and its contents when loaded to capacity have mass m, 2.5 Mg. The counterweight has mass mc 1.00Mg Problem 2. A hydraulic lift raises a 2600 lb car and the 300 lb platform on which it sits to a height of 6 ft above the floor in 12s. Determine the average power (this assumes the lift raises the car at a constant speed) the hydraulic pump must deliver to lift the system. Problem 3. An intrepid experimentalist drops the ball drops the ball with mass mwith the cord held taut in the horizontal position. The 4 m long cord has a breaking strength equal to 2.0 times the weight of the ball. Determine the angle the cord makes with the horizontal at the instant it break 7:23 PM O Type here to search 9/26/2018

Explanation / Answer

Problem.2

Total weight = 2600+300 = 2900 lbs

distance/height = 6 ft,

so amount of work done = change in potential energy = 2900*6 = 17400 ft-lbs

If it was raised at a constant velocity,

then the constant power supplied = Work Done per unit Time = 17400/12 = 1459 ft-lbs/sec

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