i need the answer quickly A tractor trailer combination has a 24,500 lb tractor and a 12,300 lb trailer. The combinationis going down a muddy hill. The tractor has wide, soft tires that float on top of the mud,(rolling resistance 80 lb/ton). The trailer has narrow, hard tires that sink deeply in the mud(rolling resistance = 220 lb/ton). What percent of downhill grade is required for thecombination to roll downhill at a constant speed without the application of any rim pull fromthe engine? Assume the combination is already moving.!!

the percentage required for downhill grad is of 42.8% appromately

Answered: A tractor trailer combination has a…

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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(Refer to the figure below) How much must the object on the right weigh if the 200-N block is to remain at rest? The friction between the block and the incline is negligible and the pulley if frictionless. Round-off your answer to whole numbers and include the unit. 200 N Fw 35.0°
This is an example diagram of Atwood’s Machine. This machine works by hanging two masses on a pulley, with each mass being acted upon by gravity. Since the masses are on opposite sides of the pulley, their weights oppose each other, and the net acceleration is less than g. To see this, please draw in all of the relevant forces in the diagram below. Be sure to indicate which direction friction in the pulley is acting. Assume m1 > m2.
The height of the g point is 0.5m, the distance of the rear wheel to theg point is 1.75m, the distance of the front wheel to the g point is 1.8 m, and the car with a mass of 2100kg brakes suddenly while moving at 24v speed. l-Find the friction coefficient between the wheel and the road? 2-Find the way the vehicle takes until it stops?
Question 4 A pulley is driven by a flat belt, the angle of lap being 120°. The belt is 100 mm wide by 6 mm thick and density is 1000 kg/m. If the coefficient of friction is 0.3 and the maximum stress in the belt is not to exceed 1.5 MPa. Calculate: 4.1. 4.2. the speed of the belt in m/s using the information related to driving pulley. the centrifugal tension and the tension on the first tight side of the belt T1. the greatest power the belt can transmit. 4.3
A great pianist is getting ready for his concert and plan to move his exclusive grand piano to his concert venue. The 700 kg piano needs to be loaded onto a truck bed which is about 1.5 m high.1.Initially, the movers decide to use an adjustable ramp to move the piano. The ramp can only be adjusted up to 10 m long and the inclination angle must not exceed 20° to ensure a safe loading process. Determine the range of a suitable length and angle of the ramp. 2.On a second thought, the movers are considering whether it is easier to lift the piano straight up onto the truck bed or push it up along the rough the ramp. With the aid of an appropriate free body diagram, justify the most efficient option for the movers to load the piano to the truck bed with constant speed. State clearly all the assumptions made, and the principles used in the calculations to support your answers.
3. A rope making 1 % turns around a stationary horizontal drum is used to support a heavy weight. If the coefficient of friction is 0.4. What weight can be supported by exerting a 50 Ib force at the other end of the rope?
21 A 180-kg block is resting on a 25 deg inclined plane with a coefficient of friction = 0.8. Find the required horizontal force P (kN) that is necessary to start the block UP the incline. ROUND OFF TO TWO DECIMAL PLACES.
In a manufacturing process, a drill press automatically drills a hole into a sheet metal part on a conveyor. In the drilling operation the drill bit starts at rest direcdly above the part, descends quickly, drills a hole, and quickly returns to the start position. The maximum vertical speed of the drill bit is 4 in./s, and while drilling the hole, it must move no more than 2.6 in./s to avoid warping the metal. Let s(t) be the drill biť's height (in inches) above the part as a function of time t in seconds. Sketch possible graphs of the drill bit's velocity [s'(t)] and acceleration [s"(t)].
The maximum friction force between a book and a desk is 12 N. If a horizontal force of 10 N is applied to the book, what is the friction force?
Drill pipes of 1000 meter original length which is between top drive drilling motor and bottom hole assembly (HWDP, collar and drill bit) is lowered into the well. The specification of drill pipe is as follows: OD=200 mm, ID=175 mm, E = 50 GPa, G=77.2 GPa weight : drill pipe = 100,000 N , bottom hole assembly = 35,000 N Before the bottom hole assembly touch the rock formation: а) Calculate the reaction force between drill pipe and top drive drilling motor b) Calculate the elongation of drill pipe After the bottom hole assembly rest/touch on the rock formation, the elongation of the drill pipe reduces by half. c) Calculate the reaction force between drill pipe and top drive drilling motor. d) Knowing that the top steel drill pipe rotates through two complete revolutions before the drill bit starts to operate, determine the maximum shearing stress caused in the pipe by torsion.
A pull of 20 N at 30° to the horizontal is necesary to move a block of wood on a horizontal table. If the coefficient of friction between the bodies in contact is 0.25, what is the weight of the block
A Volkswagen Bug weighing 3,045 lb is design with a wheelbase of 100.1 in has a center ofgravity that is 17 in above the pavement and 25 in behind the front axle. If the car is on aroadway with packed snow or ice, what is the maximum tractive effort that can be developed ifthe car is (a) front-wheel drive or (b) rear-wheel drive?

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