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Unformatted text preview: HW-CH5
9th edition CH5 Problems: 53, 59, 71, 76 8th edition CH5 Problems: 51, 57, 99, 72
53. In Fig.5-49, three connected blocks are pulled to the right on a horizontal frictionless table by a force of magnitude T3 = 65:0N . If m1 = 12:0kg, m2 = 24:0kg, and m3 = 31:0kg, calculate (a) the magnitude of the system's acceleration, (b) the tension T1 , and (c) the tension T2 . 59. A 10 kg monkey climbs up a massless rope that runs over a frictionless tree limb and back down to a 15 kg package on the ground (Fig. 5-54). (a) What is the magnitude of the least acceleration the monkey must have if it is to lift the package o the ground? If, after the package has been lifted, the monkey stops its climb and holds onto the rope, what are the (b) magnitude and (c) direction of the monkey's acceleration and (d) the 1 tension in the rope? 71. Fig.5-68 shows a box of dirty money (mass m1 =3.0kg) on a frictionless plane inclined at angle 1 = 30o . The box is connected via a cord of negligible mass to a box of laundered money (mass m2 = 2:0kg) on a frictionless plane inclined at angle 2 = 60o . The pulley is frictionless and has negligible mass. What is the tension in the cord? 76. A block of mass M is pulled along a horizontal frictionless surface by a ~ rope of mass m, as shown in Fig.5-62. A horizontal force F acts on one end of the rope. (a) Show that the rope must sag, even if only by an imperceptible amount. Then, assuming that the sag is negligible, nd (b) the acceleration of rope and block, (c) the force on the block from the 2 rope, and (d) the tension in the rope at its midpoint. 3 ...
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This note was uploaded on 05/14/2011 for the course ECON 101 taught by Professor Asdaf during the Spring '11 term at Universidad de San Buenaventura Bogota.
- Spring '11