Physics, 26.10.2020 20:40 hardworker9437
1. A 100 N weight is supported by two wires A and B as shown. What can you conclude about the tensions in these wires?
A. The tensions are equal but greater than 50 N each.
B. The tensions are equal but less than 50 N each.
C. The tensions are equal to 50 N each.
D. The tensions are equal to 100 N each.
2. An 1130 kg car is held in place by a light cable on a very smooth (frictionless) ramp, as shown. The cable makes an angle of 31° above the surface of the ramp, and the ramp itself rises at 25° above the horizontal. How hard does the surface of the ramp push on the car? To solve, make sure to find the tension in the cable first.
A. 5460 N
B. 7000 N
C. 8750 N
D. 7220 N
3. Find the tension in cord A in the figure if the weight of the suspended object is 250 N.
A. 183 N
B. 366 N
C. 224 N
D. 276 N
4. A man pushes on a piano of mass 180 kg so that it slides at a constant velocity down a ramp that is inclined at 11° above the horizontal. No appreciable friction is acting on the piano. Calculate the magnitude and direction of this push if the man pushes parallel to the incline.
A. 34.3 N up the incline
B. 337 N down the incline
C. 337 N up the incline
D. 34.3 N down the incline
5. A tetherball leans against the smooth, frictionless post to which it is attached as shown. The rope is attached to the ball such that a line along the rope passes through the center of the ball. If the rope is 1.4 m long and the ball has a radius of 0.110 m with mass 0.270 kg, what is the tension in the rope?
A. 0.193 N
B. 3.7 N
C. 3.54 N
D. 2.65 N
6. When the thigh is fractured, the patient’s leg must be kept under traction. One method of doing this is with a modified Russell traction apparatus, as shown. If the physical therapist specifies that the traction force directed along the leg must be 25 N, what should w be?
A. 15 N
B. 25 N
C. 30 N
D. 35 N
Answers: 3
Physics, 22.06.2019 06:00, Catgirl7060
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Answers: 1
Physics, 22.06.2019 10:20, yofavvlele
Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i. e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.
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