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A shaft is supported in ball bearings at A and E and loaded by a nonrotating force of 10 kN at the mid-span, C. All dimensions including the diameters of the shafts are in mm. Assume that the shaft has the ultimate tensile strength Sut = 550 N/mm2 and the endurance limit Se' = 0.5×Sut. The fraction, f, of Sut is 0.8. The stress concentration factor Kt = 1.72 and the notch sensitivity factor q=0.9. The modification factors of surface and size are ka = 0.85 and kb=0.84 respectively. First, determine whether the shaft will survive for finite life or infinite life. Also, estimate the life of the shaft.
The lumberjack runs to the other end of the log, attaining a velocity of +4.74 m/s relative to the shore, and then hops onto an identical floating log that is initially at rest. Neglect any friction and resistance between the logs and the water. W..
The upper surface of a cube of gelatin, 5.0 cm on a side, is displaced 0.64 cm by a tangential force. what is the magnitude of the tangential force
A baseball is thrown horizontally from from a height of 44.10 mabove ground with a speed of 33.5 m/s. Where is the ballafter 3.00 s have elapsed?
Two circular disks, each of area 1.90E-4 m2, are situated parallel to one another. The distance between them is small compared with their radii, Compute the force exerted by one on the other
A certain sound has an intensity of 2.0647×103 W/m2. What is the sound intensity level in decibels
Two identical point charges are fixed to diagonally oppositecorners of a square that is 0.500 m on a side. Each charge is +3.0x 10-6C. How much work is done by the electric force as one of the charges moves to an empty corner?
A heat engine operates between a high-temperature reservoir at670K and a low-temperature reservoir at 320 K. What is the magnitude of the net change in entropy as a result of this cycle
question1an old oaken buck of mass 6.75 kg hangs in a well at the end of a rope. the rope passes over a frictionless
A rectangular aperture is to be placed in the center of the beam so that the light falls perpendicularly on a wall 4.50 m away, the central maximum fills a rectangle 110 mm wide and 6 mm high. The dimensions are measured between the minima bracket..
An elevator has a mass of 1170kg and carries a maximum load of 786 kg. A constant frictionalforce of 4260 N retards its motion upward. The accelerationof gravity is 9.8 m/s2.
Two firecrackers explode at the same place in a laboratory and are separated by a time of 3 years as measured on the laboratory clock. What is the spatial distance between these two events in a rocket frame in which the events are separated in time..
Assume all temperatures to be exact, and neglect significant figures for small changes in dimension. Concrete highway slabs are poured in lengths of 9.00m. How wide should the expansion gaps between the slabs be at a temperature of 15degreeC to ensur..
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