MP #9

# MP #9 - Print View Class PH1110A2007 Assignment 9 Due at...

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1 of 4 [ Print View ] Class PH1110A2007 Assignment 9 Due at 5:00pm on Wednesday, September 19, 2007 View Grading Details Delivering Rescue Supplies You are a member of an alpine rescue team and must project a box of supplies, with mass , up an incline of constant slope angle so that it reaches a stranded skier who is a vertical distance above the bottom of the incline. The incline is slippery, but there is some friction present, with kinetic friction coefficient . Part A Use the work-energy theorem to calculate the minimum speed that you must give the box at the bottom of the incline so that it will reach the skier. Hint A.1 How to approach the problem In order to use the work-energy theorem, , you need to find an expression for the total work done on the box and for the box's initial and final kinetic energies. At least one of these quantities will depend on the unknown initial speed of the box. Part A.2 Find the total work done on the box What is , the total work done on the box between the moment it is projected and the moment it reaches the skier? Part A.2.a Find the work done by gravity What is , the work done by gravity? Express your answer in terms of some or all of the variables , , , , and . ANSWER:

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MP #9 - Print View Class PH1110A2007 Assignment 9 Due at...

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