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1.A 50 cm by 20 cm block weighing 150 N is to be moved at aconstant velocity of .8m/s on an inclined surface of 20 degreesfrom horizontal with a friction coefficient of .25.
a. Determine force F that needs to be applied in thehorizontal direction to move the block.
b. If a .3mm thick oil firm with a dynamic visocity of .015 Pas is applied between the block and inclined surface determine thehorizontal force F required to move the block
c. Determine the percent reduction in the required force whenthe oil film in b. is placed between the block and slope
2.Ball A is thrown vertically upward from the top of a30-m-high-building with initial velocity of 5m/s. At the same instant another ball B is thrown upward from the ground with aninitial velocity of 20m/s. Determine the height from the ground andthe time at which they pass.
The plate is submerged in a liquid is a vertical position with the parallel sides horizontal and the shorter parallel side at the top and exactly in the surface of the liquid.
knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest
Could effectively remove water from therecycling paradigm; and 4) the likely effects of global warming andcooling on these dynamics.
If the flowrate is Q = 25 ft^3/s and the upstream depth is 2 ft, determine the downstream depth. Sketch the specific energy diagram and indicate its important characteristics. Note that the specific discharges are different.
If the elastic limit of steel is 5.0 10^8 Pa, determine the minimum diameter a steel wire can have if it is to support a 69-kg circus performer without its elastic limit being exceeded.
Three reservoirs are connected by three pipes with hA = 100 f t, hB = 20 f t, hC = 0 f t, L1 = 1000 f t, L2 = 500 f t, L3 = 400 f t and D1 = D2 = D3 = 1 f t. Determine flow rate into or out of each reservoir if friction in each pipe is 0.02.
The plate is submerged in a liquid is a vertical position with the parallel sides horizontal and the shorter parallel side at the top and exactly in the surface of the liquid. The static moment of the plate with respect to the surface of the liqui..
A cylindrical tank with inside diameter of 300mm and wall thickness of 5mm is subjected to an internal pressure of 2Mpa. The tensile stress in mpa in the wall of the tank is mostly near
How does the engineering classification of soils differ from he engineering classification of rocks
A loose, uncompacted sand fill 6 ft in depth has a relative density of 40%. Laboratory tests indicated that the minimum void ratios of the sand are 0.46 and 0.90, respectively. The specific gravity of solids of the sand is 2.65.
What is the length of a 200 ft. steel tape having a cross-sectional area of 0.004in2 and a modulus of elasticity of 30,000,000 lb/in2 that is standardized at a tension of 20 lb and a temperature of 68°F
A 100-ft steel tape was used in the field to measure a distance of 247.53 ft. the following data represents the conditions in the field at the time of measurement: tempreture = 41 F, tension = 30 ib, and tape supported at ends only.
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