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The coefficients of friction are ms=0.40 and mk=0.30 between all surfaces of contact. Determine the smallest force P required to start the 30-kg block moving if cable AB (a) is attached as shown, (b) is removed.
a 250-kg crate b is suspended from a cable attached to a 20-kg trolley a which rides on an inclined i-beam as shown.
the 2-lb box has a velocity of 5 fts when it begins to slide down the smooth inclined surface at a. the coordinates of
a mixture that is 15 percent carbon dioxide 5 percent carbon monoxide 10 percent oxygen and 70 percent nitrogen by
steam at 1 bar enters an adiabatic heat exchanger with a quality of 0.901 and exits as a saturated liquid. the steam is
a large fireplace in a ski lodge has a glass firescreen which covers a vertical opening in the fireplace. the opening
a system changes its state from state 1 to state 2 following pvconstant.. the pressure p and specific volume v at state
an air bubble 0.3 in. in diameter is released from the regulator of a scuba diver swimming 100 ft. below the sea sg
the 4-mm-diameter cable bc is made of a steel with e 200 gpa. knowing that the maximum stress in the cable must not
at 100 lbfin2 saturated vapor h2o flows in a pipe. a valve is opened to vent a small amount to the atmosphere. assuming
a brass rod 100 mm long and 5 mm in diameter extends horizontally from a casting at 200 degree c. the rod is in an air
a 1.0-m-diameter hollow sphere weight 200 n is attached to a solid concrete block weight 4.1 kn. if the concrete has a
determine diameter of a circular rod of ductile material with a fatigue strength ,e=280 Mpa. Add a tensile yield strength of 350 Mpa. The member is subjected to a varying axial load from 700 kN to -300kN. Assume Kt=1.8 and factor of safety=2.
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