3.2- m 10m Mg 4.0 m iom 1.0m Problem 3: The forces acting on a 67000 kg aireraft flying at constant speed are shown in the figure above on the left. The engine thrust, Fr = 500 000 N, acts on a line 1.6 m below the center of mass (CM). The lift force, Fr, acts at a distance of 3.2 m to the right of the center of mass (CM) (a) Determine the lift force F. Answer: Ft 656 600 N. (b) Determine the drag force Fp and the distance y above the CM that the drag force Fp acts on the plane. Answer: Fp = 500000N and y 2.6m. Problem 4: A 60 kg painter is on a uniform 25 kg scaffold that is supported above by two ropes (see the figure above on the right). There is a 4.9 kg pail of paint to one side. How close to the left end of the scaffold can the painter get before the scaffold tips over. In other words, what is r, as shown in the figure above on the right. Hint: The value of z must be less than 1.0 m. Thus, the painter will be to the left of the rope on the left. Also, the scaffold will tip over when the tension from the rope on the right is 0. Answer: z = 0.085 m.

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Problem 3: The forces acting on a 67000 kg aircraft flying at constant speed are shown in the figure
above on the left. The engine thrust, Fr = 500 000 N, acts on a line 1.6 m below the center of mass (CM).
The lift force, Fi, acts at a distance of 3.2 m to the right of the center of mass (CM) (a) Determine the lift
force FL. Answer: Fi = 656 600 N. (b) Determine the drag force Fp and the distance y above the CM
that the drag force Fp acts on the plane. Answer: Fp = 500000 N and y = 2.6 m.
Problem 4: A 60 kg painter is on a uniform 25 kg scaffold that is supported above by two ropes (see the
figure above on the right). There is a 4.9 kg pail of paint to one side. How close to the left end of the
scaffold can the painter get before the scaffold tips over. In other words, what is r, as shown in the figure
above on the right. Hint: The value of z must be less than 1.0 m. Thus, the painter will be to the left
of the rope on the left. Also, the scaffold will tip over when the tension from the rope on the right is 0.
Answer: 1 = 0.085 m.
Transcribed Image Text:1.0m Mg "i0m 4.0m iom Problem 3: The forces acting on a 67000 kg aircraft flying at constant speed are shown in the figure above on the left. The engine thrust, Fr = 500 000 N, acts on a line 1.6 m below the center of mass (CM). The lift force, Fi, acts at a distance of 3.2 m to the right of the center of mass (CM) (a) Determine the lift force FL. Answer: Fi = 656 600 N. (b) Determine the drag force Fp and the distance y above the CM that the drag force Fp acts on the plane. Answer: Fp = 500000 N and y = 2.6 m. Problem 4: A 60 kg painter is on a uniform 25 kg scaffold that is supported above by two ropes (see the figure above on the right). There is a 4.9 kg pail of paint to one side. How close to the left end of the scaffold can the painter get before the scaffold tips over. In other words, what is r, as shown in the figure above on the right. Hint: The value of z must be less than 1.0 m. Thus, the painter will be to the left of the rope on the left. Also, the scaffold will tip over when the tension from the rope on the right is 0. Answer: 1 = 0.085 m.
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