7.4 - Hydraulic and Pneumatic Systems

A certain hydraulic system is designed to exert a force 100 times as large as the one put into it. (a) What must be the ratio of the area of the cylinder that is being controlled to the area of the master cylinder? (b) What must be the ratio of their diameters? (c) By what factor is the distance through which the output force moves reduced relative to the distance through which the input force moves? Assume no losses due to friction.

A warehouse consists of 5 aisles of rack (racks on both sides of each aisle) and a loading dock.  The rack system is four levels high. Forklift trucks are used to transport loads between the loading docks and the storage compartments of the rack system in each aisle. The trucks move at an average speed of 120m/mim (loaded)  and 150m/min (empty). Load handling time (loading plus unloading)  per delivery totals 1.0 min per storage/retreival delivery on average, and the anticipated traffic factor  = 0.90, worker efficiency = 100% and vehicle availability = 95%. The average distance between the loading docks and the center of aisles 1 through 5 are 150m,  250m, 350m,  450m, 550m respectively. These values are to be used to compute travel times. The required rate of storage/retreival deliveries is 75/hr, distributed evenly among the 5 aisles and the trucks perform either storage or retrieval deliveries but not both in one delivery cycle.  Determine the number of forklift trucks required to…

A Motor Pulleys crate M OD Problem Statement: One cable runs from a winch motor M, around pulley D, to the ceiling. A second cable runs from the axis of pulley D, around pulleys C, B, and A, to the ceiling. A crate is suspended from the axes of pulleys A and C. The motor winds up its cable at a rate of 50.3 m/s. Assuming the crate stays level, determine: The speed of the crate after 10 seconds: 1.247 m/s The time required for the crate to travel 6.1 meters: 4.918 s Be sure to include units with your answers.

State 5 main faults and hazards in the pressurized system andthe way to avoid them. Also, state the different steps withpictures if possible the way the vane pump can be repaired. Thencompare the different safety issues between pneumatic and hydraulicas there are differences in the pressure. Finally, use thefault-finding technique to show how to solve the lack of pressureto the cylinder for a pneumatic circuit and the importance of maintenance to avoid these problems in the future.

2. An automobile and its load weigh 22.5 KN and the center of gravity is 0.60 m above ground level and midway between the front and rear wheels, 2.44 m apart. The car is brought to a complete stop from a speed of 96.5 km/hr in 10 seconds by means of the breaks. Find the normal pressures on each of the front and rear wheels. Let NF = normal pressure on one front wheel REF = reversed effective force = a NR = normal pressure on one rear wheel REF 0.60 m R F 1.22 m 1.22 m 2NR 2NF

A A hydraulic piston controls the opening of a car's trunk lid. What is the magnitude of the velocity and acceleration of the end B if è = -0.683 rad/s, ê = -0.1585 rad/s', || rB| = 0.3 m, Bl= -0.0549 m/s, i %3D d² and ||rBll = 0.0375 m/s²? %3D dr?

Many people compete in car racing that allows them to modify their car's suspension to improve handling. Lowering your car lowers its center of gravity which decreases "weight transfer" and it may also lower your car's "roll center" and change other aspects of your car's suspension geometry in ways that help handling. But sometimes these changes hurt. Lowering the car makes if more susceptible to bottom- ing out. This pounding can cause damage to your car's suspension and chassis if it is excessive. If you lowered the suspension on your car and it bottomed out, how could you prevent it from happening, without raising the suspension, and how would the adjustment change the ride?

Give THREE examples of FORCES in your future career (in MD, DO, DDS, PA, PT, Envir. Sci, etc.) AND the physical mechanisms that produce those forces (such as muscles powered by ATP and explain how the ATP produces those forces, or the forces on the walls of blood vessels exerted by systolic and diastolic blood pressure.) (It's Physics and I need big help with this one) help ASAP!!!

L = aî + btº j + ctk where, a = 2.4 kg-m/s; b = 3.8 kg-m/s3; c = -9.6 kg-m/s? Determine the magnitude of the rate of change (with respect to time) of vector Lat t = 2.5 s

A motorcycle and rider have a combined mass of 350kg. The vehicle’s velocity is 100 km/hr. The rider is to go up a hill incline of 10 meters. The wheels each have a mass of 20 kg and a diameter of 500mm. The wheel design consists of 6 spokes with a mass of 0.5 kg for each spoke. 3) Explain the transfer energy and how this affects the behaviour of the system.