# me244_hw3 - _m/s Question 3(1 point The block and tackle...

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Online Homework System Assignment Worksheet 3/20/09 - 10:49 AM Name: ____________________________ Class: dynamics Class #: ____________________________ Section #: ____________________________ Instructor: Koray Safak Assignment: ME244 Homework #3 Question 1: (1 point) The collar has a mass of 30 kg and is supported on the rod having a coefficient of kinetic friction The attached spring has an unstretched length of 0.2 m and a stiffness N/m. Determine the speed of the collar after the applied force N causes it to be displaced m from point When the collar is held at rest. Neglect the size of the collar in the calculation. ____________ m/s Question 2: (1 point) The 2-kg collar is attached to a spring that has an unstretched length of 3 m. If it is drawn to point and released from rest determine its speed when it arrives at point Page 1 of 3 PHGA OneKey - dynamics 20.03.2009 http://phga.pearsoncmg.com/onekey/modules/configureTest.Login

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Unformatted text preview: ____________m/s Question 3: (1 point) The block and tackle arrangement for the oil rig is shown schematically in the figure. Determine the power output of the draw-work motor necessary to lift the 600-lb drill pipe upward with a constant speed of 4 ft/s. ____________ hp Page 2 of 3 PHGA OneKey - dynamics 20.03.2009 http://phga.pearsoncmg.com/onekey/modules/configureTest.Login Question 4: (1 point) If the roller-coaster car has a speed ft/s when it is at and coasts freely down the track, determine the speed i attains when it reaches point Also determine the normal force a 150-lb passenger exerts on the car when it is at At this point the track follows a path defined by Neglect the effects of friction, the mass of the wheels, and the size of the car. ____________ ft/s ____________ N Page 3 of 3 PHGA OneKey - dynamics 20.03.2009 http://phga.pearsoncmg.com/onekey/modules/configureTest.Login...
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me244_hw3 - _m/s Question 3(1 point The block and tackle...

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