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a square-threaded screw is used in a press shown to exert a pressure of 4000 lb the screw has a mean diameter of 3 in
a v-belt with a groove angle of 60deg drives a 037-m-diameter pulley on a small concrete mixer the contact angle is
the mean diameter of a square-threaded jackscrew is 300 in the pitch is 040 in and the coefficient of static friction
a 5-in-diameter steel sphere is rigidly attached to the end of a 24- in-long 1 1 2 -in-diameter aluminum rod locate the
a cylindrical cast-iron casting has an axial hole extending partway through the casting as shown locate the center of
a band brake is in contact with drum c through an angle of 180deg and is connected to the horizontal lever at a and b
a ship may exert an estimated pull of 8000 lb on its hawser a heavy rope which is wrapped around a mooring post on the
a machine having a mass of 500 kg is to be raised using a wedge as shown the coefficient of friction on all surfaces is
calculate the force p necessary to start the block c sliding upward as shown the coefficient of static friction for all
the end of a timber beam is to be lifted using a steel wedge at b as shown determine the force p that must be applied
the blocks shown are separated by a solid strut attached to the blocks with frictionless pins the coefficient of static
compute the minimum weight of block a shown for motion to be impending down the plane assume the pulley to be
in the figure shown block r has a mass of 90 kg and block q has a mass of 45 kg they are connected by a rope parallel
a built-up steel member is composed of a w21times62 wide-flange section with a c12times25 american standard channel
a 2-in-diameter hole 5 in long is drilled into the center of the top face of a steel cube that is 6 in on each side the
the u-shaped built-up section shown is composed of dressed s4s timber sections see appendix e for dressed sizes locate
write a program that will calculate the location of the centroid of a semicircle measured from the diameter line this
the head of a maul is made of steel and is 3 in in diameter and 5 in long it has a wood handle 1 in in diameter and 3
for the area shown the x-x centroidal axis is required to be located at 10 in above the reference axis calculate the
write a program that will calculate the location of the centroid for a tee shape similar to that of problem 77 user
find the center of gravity for the three-axle truck shown the front axle supports a mass of 35 mg the middle axle
a thin steel plate having the dimensions shown contains three 2- in-diameter holes note the axis of symmetry locate the
1 check the tabulated moment of inertia for a 300times610 nominal-size timber cross section2 for the cross section of
calculate the moment of inertia of the triangular area shown with respect to the x-x centroidal axis and with respect