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block a in the figure shown has a mass of 10 kg and block b has a mass of 20 kg the coefficients of static friction are
a body weighing 100 lb rests on an inclined plane as shown the coefficient of static friction between the body and the
in the figure shown the coefficient of static friction between the 160-lb crate and the floor is 035 calculate the
a 500-lb block rests on a horizontal surface as shown the coefficient of static friction is 025 calculate the maximum
a ladder 8 m long and having a mass of 25 kg rests on a horizontal floor and is supported by a vertical wall the ladder
assume that the rope is removed from the base of the ladder in problem 643 calculate the minimum angle at which the
compute the minimum weight of block b that will prevent the two-block system shown from sliding block a weighs 100 lb
a 47 lb body is supported on a plane inclined 33deg to the horizontal as shown the coefficient of static friction
a 325-lb block rests on a plane inclined 25deg with the horizontal calculate the coefficient of static friction between
a 50-lb block rests on a rough inclined plane if the coefficient of friction between the block and the plane is 050
a 1-ton weight rests on a horizontal floor the coefficient of static friction between the weight and the floor is 035
the tool locker of problem 63 is 08 m by 08 m square in plan and 2 m high determine the height above which a horizontal
1 a horizontal force of 18 lb is required to just start a 45-lb block in motion on a horizontal surface determine the
a weight w is to be held aloft by wrapping a rope around a horizontal stationary pole the coefficient of static
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