13–9. The conveyor belt is moving at 4 m/s. If thecoefficient of static friction between the conveyor andthe 10-kg package B is µ, = 0.2, determine the shortesttime the belt can stop so that the package does not slideon the belt.13–10. The conveyor belt is designed to transport packagesof various weights. Each 10-kg package has a coefficient ofkinetic friction Hk = 0.15. If the speed of the conveyor is5 m/s, and then it suddenly stops, determine the distance thepackage will slide on the belt before coming to rest.

13-9. Given data: The velocity of belt, v = 4 m/s. The mass of package, m = 10 kg. The friction…

Answered: 13–9. The conveyor belt is moving at 4…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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The 210-kg crate rests on the ground for which the coefficients of static and kinetic friction are us = 0.5 and ui = 0.4, respectively. The winch delivers a horizontal towing force T to its cable at A which varies as shown in the graph. Originally the tension in the Part A cable is zero. (Figure 1) Determine the speed of the crate when t = 3.8 s. Hint: First determine the force needed to begin moving the crate. Express your answer to three significant figures and include the appropriate units. > View Available Hint(s) HA v = Value Units Submit Figure Provide Feedback T (N) 800 T= 400 1/2 t (s)
Two blocks A and B have a weight of 11 lb and 6 lb , respectively. They are resting on the incline for which the coefficients of static friction are μA = 0.16 and μB = 0.23. Determine the angle θ which will cause motion of one of the blocks. What is the friction force under each of the blocks when this occurs? The spring has a stiffness of k = 2 lb/ft and is originally unstretched. Determine the smallest angle θ which will cause motion of one of the blocks. Determine is the friction force under the block A at this angle. Determine is the friction force under the block B at this angle.
The 2-kg spool S fits loosely on the inclined rod for which the coefficient of static friction is μ = 0.28. (a) If the spool is located 0.25 m from A, determine the maximum constant speed the spool can have so that it does not slip up the rod. Express your answer to three significant figures and include the appropriate units.
Block A has a mass of 26 kg and block B has a mass of 43 kg. The two blocks are stacked on the ramp with an incline of 0 = 33°. Determine the largest horizontal force F that can be applied to block B without either block moving for each of the following two cases: a.) The friction coefficient for the contact between blocks A and B is Ha1 = 0.62 and the friction coefficient for the contact between block A and the ramp is H2 = 0.26. b.) The friction coefficient for the contact between blocks A and B is Ha1 = 0.62 and the friction coefficient for the contact between block A and the ramp is H2 = 0.65. F В A Part a) The limiting slip condition occurs at the contact betveen A and the ramp ♥ N The maximum force before either block A or B slips is Part b) The limiting slip condition occurs at the contact between A and B N. The maximum force before either block A or B slips is
Determine the maximum and the minimum values of weight W which may be applied without causing the 25-kg block to slip. The coefficient of static friction between the block and the plane is μs= 0.2, and between the rope and the drum D is μ′s= 0.3.
2. The 10-Ib block has a speed of 4 ft's when the force of F= (8t?) Ib is applied. Determine the velocity of the block when t= 2 s. The coefficient of kinetic friction at the surface is = 0.2. v = 4 ft/s F= (8°) lb
2. The car has a mass of 1.6 Mg and center of mass at G. If the coefficient of static friction between the shoulder of the road and the tires is µs = 0.4, determine the greatest slope the shoulder can have without causing the car to slip or tip over if the car travels along the shoulder at constant velocity. 2.5 ft 5 ft 4 ll
The truck is traveling at 18 km/h when the trailer coupling at A fails. If the trailer has a mass of 255 kg and it travels a distance of 40 m before coming to a stop, determine the constant horizontal force F created by bearing friction that causes the trailer to stop (in N). NL (O) == O F
2. The car, having a mass of 1000 kg, is traveling horizontally along a 20° banked track which is circular and has a radius of curvature of p = 100 m. If the coefficient of static friction between the tires and the road is us = 0.3, determine the minimum and maximum constant speed at which the car can travel without sliding down and up the slope. Neglect the size of the car. e= 20°
Determine the maximum value of weight W which may be applied without causing the 50-lb block to slip. The coefficient of static friction between the block and the plane is µ, = 0.2, and between the rope and the drum D µ; = 0.3. D W 1 Add file
The man is pedaling his bicycle at a constant speed up a slippery slope of 5%. The man and the bicycle have a total mass of 82 kg centered at G. If the rear wheel is about to slip, find the coefficient of friction u between the tire and the road. If the coefficient of friction were doubled, what friction force would act on the rear wheel? (Why can we neglect the friction under the front wheel?)
Question: The 250-kg crate rests on the ground for which the coefficients of static and kinetic friction are μs = 0.5 and μk = 0.4, respectively. The winch delivers a horizontal towing force T to its cable at A which varies as shown in the graph. Originally the tension in the cable is zero Part A) Determine the speed of the crate when t = 3.9 s. Hint: First determine the force needed to begin moving the crate. Express your answer to three significant figures and include the appropriate units.

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