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Q: 5. A skier wishes to build a rope tow to pull herself up a ski hill that is inclined 15° with the…
A: angle of the ramp A= 150 a= 1.2 m/s2 m= 54 kg let the tension in the string be T g= 10 m/s2
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Coefficient of friction between the tyres and the road=0.5, g=9.8 m/s2
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- 4. A horizontal force F is being used to push an object up a smooth inclined plane. The angle between the plane and the horizontal is 0. The normal force is (a) mg cos+ F cos 0 (b) mg cos 0 (c) mg cos 0 F sin 0 (d) mg cos 0+F sin 0 (e) mg cos 0 F cos 08. A 2.5 kg wagon is pulled with a force of 25 N at an angle of 18° above the horizontal. If the object is moving constantly forward, what is the force of kinetic friction acting on the wagon? 23 N [left] b. 24 N [left] 25 N [left] d. 21 N [left] 22 N [left] а. е. с.Find the nearest maximum mass of the lamp that the cord system can support so that no single cord develops a tension exceeding 400 N. B 45° C F 30° E
- 3. A large 45.5 kg box is pushed along the floor at a constant velocity of 0.75 m/s [forward].Calculate the coefficient of friction if the applied force is 375 N [forward].1. If M = 6.0 kg, what is the tension in string 1 and 2? 30% 60° M2. (a) A distant planet has radius 3.6 x 106 m. A 6 kg cat weighs 22 N on the surface of this planet. Calculate the mass of the planet. (b) You push a 65 kg desk horizontally and it accelerates at 1.2 m/s2. If the coefficient of kinetic friction between the desk and floor is 0.38, calculate the magnitude of the force you apply to the desk.
- السؤال 34 One of the following could be a kinetic friction coefficient Hk: 0.15 N O 0.15J O 0.15 O 0.15 N/m Up O10. An object weighing 4.6 N falls from rest subject to a frictional drag force given by Fdrag = bv2, where v is the speed of the object and b = 3.4 N ∙ s2/m2. What terminal speed will this object approach? (Give answer to the nearest 0.01 m/s).An elevator cab that weighs 28.6 kN moves upward. What is the tension in the cable if the cab's speed is (a) increasing at a rate of 1.20 m/s? and (b) decreasing at a rate of 1.20 m/s?? (a) Number i Units (b) Number i Units This answer has no units • (degrees) Attempts: 0 of 3 used Submit Answer Save for Later kg m/s m/s^2 N N/m kg-m/s or N.s N/m^2 or Pa kg/m^3 m/s^3 times
- 8. An object is pulled across a rough horizontal surface with an applied force of 300 N [40o below the horizontal]. The applied force is slowly rotated down toward the horizontal, decreasing the 40o angle. What will happen to the force of friction acting on the object and the acceleration? a. Both increase.b. Both decrease.c. Friction decreases and acceleration increases.d. Friction increases and acceleration decreases.e. None of the above statements are accurate.2. You place a crate of mass 37.0 kg on a frictionless 4.65-meter-long incline. You release the crate from rest, and it begins to slide down, eventually reaching the bottom 1.37 s after you released it. What is the angle of the incline? 42.4 degrees 55.1 degrees 36.4 degrees 30.3 degrees2. A car is traveling at 100 km/h along a straight, level road when its brakes become locked. Determine the stopping distance of the car knowing that the coefficient of kinetic friction between the tires and the road is 0.65.