A large 16.0-kg roll of paper with radius R = IS.O cm rests against the wall and
Question:
A large 16.0-kg roll of paper with radius R = IS.O cm rests against the wall and is held in place by a bracket attached to a rod through the center of the 311 roll (Fig. 10.54). The rod turns without friction in the bracket, and the moment of inertia of the paper and rod about the axis is 0.260 kg ¢ m2¢ The other end of the bracket is attached by a frictionless hinge to the wall such that the bracket makes an angle of 30.00 with the wall. The weight of the bracket is negligible. The coefficient of kinetic friction between the paper and the wall is μk = 0.25. A constant vertical force F = 40.0 N is applied to the paper, and the paper unrolls. (a) What is the magnitude of the force that the rod exerts on the paper as it unrolls? (b) What is the magnitude of the angular acceleration of the roll?
Transcribed Image Text:
40.0 N
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IDENTIFY Apply Festma and 71 to the roll SET UP At the point of contact the wall exerts a fricti...View the full answer
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