Chapter_5__Student_Problems

# Chapter_5__Student_Problems - on which an xy coordinate...

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Problem 5-4 Three astronauts, propelled by jet backpacks, push and guide a 120 kg asteroid toward a processing dock, exerting the forces shown in Figure 5-31, with F 1 = 32 N, F 2 = 55 N, F 3 = 41 N, θ 1 = 30°, and θ 3 = 60°. What is the asteroid's acceleration (b) a magnitude and (c) a direction relative to the positive direction of the x axis? a = .88 m/s 2 θ = - 11 o

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Problem 5-9 (a) An 11.0 kg salami is supported by a cord that runs to a spring scale, which is supported by a cord hung from the ceiling (Figure 5-34 a ). What is the reading on the scale, which is marked in weight units? (b) In Figure 5- 34 b the salami is supported by a cord that runs around a pulley and to a scale. The opposite end of the scale is attached by a cord to a wall. What is the reading on the scale? (c) In Figure 5-34 c the wall has been replaced with a second 11.0 kg salami, and the assembly is stationary. What is the reading on the scale? F g = 108 N
Problem 5-15 A constant horizontal force F a pushes a 2.00 kg FedEx package across a frictionless floor

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Unformatted text preview: on which an xy coordinate system has been drawn. Figure 5-37 gives the package's x and y velocity components versus time t . What are the (a) magnitude and (b) direction of F a ? θ = - 59.0 o F = 11.7 N Problem 5-45 Three connected blocks are pulled to the right on a horizontal frictionless table by a force of magnitude T 3 = 65.0 N. If m 1 = 12.0 kg, m 2 = 24.0 kg, and m 3 = 31.0 kg, calculate (a) the magnitude of the system's acceleration, (b) the tension T 1 , and (c) the tension T 2 . a a = .970 m/s 2 T 1 = 11.6 N T 2 = 34.9 N Problem 5-47 Figure 5-51 shows two blocks connected by a cord (of negligible mass) that passes over a frictionless pulley (also of negligible mass). The arrangement is known as Atwood's machine. One block has mass m 1 = 1.3 kg; the other has mass m 2 = 2.8 kg. What are (a) the magnitude of the blocks' acceleration and (b) the tension in the cord? a a m 2 g m 1 g T T a = 3.6 m/s 2 T = 17 N...
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Chapter_5__Student_Problems - on which an xy coordinate...

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