Two masses m₁ = 7.1 kg and m2 = 3.6 kg are connected by a string as shown. If the pulley is massless and the surf is frictionless, the magnitude of the tension in the string is A. 11.4 N OB. 11.9 N OC. 23.4 N OD. 46.2 N OE. 69.6 N 3 m₁ m₂ .
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- A 7.1 N was applied to a 7.2 kg block, find the normal force if the angle e = 9.1 degrees. %3D F Select one: O a. 63.6214 N Ob. 77.6426 N Oc. 70.6320 N Od. 63.5771 NName: ID: A 10. If F= 40N and M 1.5 kg, what is the tension in the string connecting Mand 2M? Assume that all surfaces are frictionless. 2M M a. 13 N b. 23 N 36 N d. 15 N 28 N C. e. a8. At an amusement park there is a ride in which cylindrically shaped chambers spin around a central axis. People sit in seats facing the axis, their backs against the outer wall. At one instant the outer wall moves at a speed of 3.70 m/s, and an 87.0-kg Sferson feels a 565-N force pressing against I m Ssfs back. What is the radius of the chamber? 60 ss 60 s
- 65.0 N 30 30.0 N- 20 20.0 N What is the magnitude of the resultant of these three forces? a. 27.0 N b. 33.2 N c. 36.3 N d. 23.8 N 105 N e.A. 700 N 100 N Dick and Jane stand on a platform of negligible weight, as shown in the figure. Dick weighs 700 N, and Jane weighs 400 N. Jane is pulling down on the rope creating tension in it and supporting some of her weight. Assume the platform is in _equilibrium approximately what is the downward force that Jane is exerting on the platform? ON B. C 370 N D. E. 50 N DICK 33 N JANE 400 N5. Determine the force exerted by the cable at B and the reaction at support A for the bar shown. You may assume the bar is massless for the analysis. Write your answers using 3 significant digits. y A 900 N Cable B 22° C 40° 300 mm 250 mm
- 6. A box is on a ramp inclined at 25° to the horizontal. The coefficient of static friction is .30, and of kinetic friction .20. 1²=30 pe Me=20m a. The box slides down the ramp. b. The box stays on the ramp without slipping. c. The box first slips, but then stays fixed after slowing down. d. We need the mass of the box to answer the question. 3250 www th mg OL M = mg COSTSA block resting on a plane inclined at an angle 36o from the horizontal is being held in place by steel cables a, b, and c as shown in the figure below. The tension in cable b is 75.0 N. Note that cable a is parallel to the surface of the incline and that cable b is perfectly horizontal. a. determine the normal force N and the force due to gravity ??.b. What is the mass of the block in kilograms?A box of mass M = 50 kg rests on a rough (ji) horizontal surface. When a force F = 300 N is acted on the box as %3D %3D shown in the figure below, the box becomes on the verge of slipping (Y alig de j gainall ). The coefficient of static friction of the rough surface is: F A. 0.92 B. 0.75 40° C. 0.14 D. 0.57 E. 0.34
- 6. The coefficient of kinetic friction between the block and the inclined surface of the figure below is 0.3 and the coefficient of static friction is 0.9. Each block is 1 kg. The pulley is frictionless and the string is massless. What is the magnitude of the acceleration of the blocks if the system is released from rest? A. 0 m/s² B. 0.55 m/s² C. 0.97 m/s² D. 1.3 m/s² E. 2.2 m/s² ys 1AC 1kg 1kg 40⁰An astronaut has a weight of 500 N on the Earth. They then travel to a new planet which has twice the mass of the Earth and twice the radius of the Earth. The weight of the astronaut on this new planet would be a. 500 N b. 2000 N с. 250 N O d. 125 N O e. 1000 N3. 7.00 kg 3.00 kg 7.00 kg What is the force by tension above the single 7kg bucket hanging on the left? A 68.6 N В. 80.7 N C. 40.3 N D. 12.11 N Page 4 I 21 Q +