COOP_5 10

# COOP_5 10 - 2 An object of mass M is released from rest...

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Name: ______________________________Section/Instr.: ___________________ Partners: __________________________________________________________ Physics 2207, Fall 2010 1 Cornell University Cooperative Problems 5: Work and Energy 1. A 50-kg trunk is pushed 6.0 m at constant speed up a 30 incline by a constant horizontal force. The coefficient of kinetic friction between the trunk and the incline is 0.20. (a) Draw a free-body diagram showing all the forces acting on the trunk. (b) Calculate the work done on the trunk by (i) the applied force; (ii) the weight of the trunk; and (iii) friction. (c) By how much does the total mechanical energy of the trunk change in this displacement?

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Physics 2207, Fall 2010 2 Cornell University
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Unformatted text preview: 2. An object of mass M is released from rest from a point P on the frictionless track shown in the figure. P is located a height h from the bottom of the track. (Use conservation of energy method throughout.) (a) What is the speed v at point Q (top of the loop) as a function of h ? (b) Draw a free-body diagram for the mass at point Q. (c) What is the centripetal acceleration of the mass at point Q given the speed computed in (a)? (d) What is the value of the normal force when the speed v at Q is equal to its minimum value compatible with the mass remaining in contact with the loop? (e) What is the minimum value of h so that the mass completes the loop without losing contact with the track?...
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COOP_5 10 - 2 An object of mass M is released from rest...

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