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A sled is at the top of a snowhill that has a vertical height of 150 ft and slopes down with an angle of 20 degrees. If the coefficient of friction of the sled runners is .1 lb/lb, how fast is the sled going when it reaches the bottom of the hill, carrying a 165 lb person (weight includes sled), if it started from rest? Determine the total time for the sled to reach the bottom? how long would it take to reach the bottom if the slider gave it a 30 ft/sec sendoff?
the coefficients of static friction and kinetic friction 0.4, 0.30 between all surface of contact. determine the force p for which motion of the 30kg block is impending if cable AB is attached is shown and removed.
a new cast iron pipe is 5 km long and 15 mm diameter is used to convey water at a rate of 0.0150m3s-1. given the
As the hollow steel (G = 77 GPa) shaft shown rotates at 180 rpm, a stroboscopic measurement indicates that the angle of twist of the shaft is 3°. Determine
Motor coming to rest, A motor is running at 12 rpm and the switch is flipped and cuts the power. The rotor weighs 75 lbs.
Determine the turbine inlet temperature, the cycle thermal efficiency, and the back-work ratio of this cycle.
The lamp has a mass of 15 kg and is supported by a pole AO and cables AB and AC. If the force in the pole acts along its axis, determine the forces in AO, AB, and AC for equilibrium.
Determine the number of storage bits required in the controller memory so that the accuracy of the joint is as close as possible to, but less than, its repeatability. Use six standard deviations as the measure of repeatability.
The assessment to design a substation and the associated protection System.
If cable spacing is 1 m into the paper, what is the cable tension.
What is the enthalpy of this reaction? Assume that no heat is lost to the surroundings or to the coffee cup itself.
If the efficiency of the turbine in converting the mechanical energy given up by the fluid to the turbine shaft is 89% (nt = 0.89), calculate the friction loss in the turbine in J/kg.
air enters a compressor operating at steady state with a pressure of 1 bar a temperature of 20degc and a volumetric
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