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The wheel has mass m, radius R and moment of inertia IG = mR2/2. The wheel is initially at rest, and it is subjected to a pair of forces with equal magnitude F and opposite directions as shown. When the wheel rolls without slipping, the coefficient of friction between the wheel and the floor is μs = .5. When the wheel rolls and slips, the coefficient of friction between the wheel and the floor is μk = .3. Find the acceleration of the center of the wheel if
(a) F = mg/2,
(b) F = mg.
calculate the escape speed from the earth for a 4800 kg spacecraft and determine the kinetic energy it must have at the
Air enters an 8” diameter pipe at atmospheric pressure at a velocity of 30 ft/s and 65 F and exits at approximately the same pressure. While in the pipe, the air passes over a heat exchanger that causes its temperature to increase by 25 F.
The rolling texture of most hcp metals can be roughly described by an alignment of the c-axis with the rolling plane normal. Zinc is an exception. The c-axis tends to be rotated as much as 80? from the rolling plane normal toward the rolling directio..
As shown, a 3.1-lb ball is suspended at point D inside a box with dimensions w=9.50 ft, d=6.50 ft, and h=4.50 ft. The ball is held in place by three cables anchored at points A,B, and C on the surface of the box.
A can of soft drink at a temperature of 40°F is taken from a refrigerator into a room where the temperature is 70°F and the relative humidity is 70%. Explain why beads of moisture form on the can's outer surface. Provide supporting calculations.
a rigid 1.2m3 tank contains water at pressure of 198.5 with 10 percent liquid and 90 percent vapor by volume. a
question 1consider the figure below which shows the energy-band splitting of silicon. if the equilibrium lattice
The 4 lb pulley has a diameter of 1 ft and the axle has a diameter of 1 in. if the coefficient of kinetic friction between the axle and the pulley is 0.20, determine the vertical force P on the rope required to lift the 20 lb block at constant vel..
1 what cooling air flow rate would be required to maintain a space at 72 degrees f if it had a sensible cooling load of
Air at 127°C flows over the plate with a heat transfer convection coefficient of 15 W/m2 · K. Determine the emissivity, absorptivity, and radiosity of the plate. What is the net heat transfer rate per unit area?
Construct a suitable finite element model and compare the FEA predictions with the theoretical data and produce a graph to show the stress distribution
With the presence of stagnant air in the steam, the condensate surface temperature drops from 28 to 24°C and the condensate rate is reduced by a factor of 2. For the air-steam mixture, determine the partial pressure of air as a function of distanc..
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