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A baggage conveyor is used to unload luggage from an airplane. The 10 kg duffel bag A is sitting on top of the 20 kg suitcase B. The conveyor is moving the bags down at a constant speed of 0.5 m/s when the belt suddenly stops. Knowing that the coefficient of friction between the belt and B is 0.3 and that bag A does not slip on suitcase B, determine the smallest allowable coefficient of static friction between the bags.
a flywheel can be considered as being composed of a thin disc and a rim. the rim weighs 322 lb and has diameters of 24
the atmospheric pressure at a location is usually specified at standard conditions but it changes with the weather
the fracture strength of glass may be increased by etching away a thin surface e layer. it is believed that the etching
a gate in the shape of a quarter cylinder hinged at a and sealed at b is 3 m wide. the bottom of the gate is 4.5 m
a baseball player catching a ball can soften the impact by pulling his hand back. assuming that a 5-oz ball reaches his
the range of human hearing extends from approximately 20 hz to 20000 hz.a find the wavelength for 30 hz at a
q1 figure shows a scale drawing of the temperature profile through a composite plane wall.i identify the layer with the
water in a piston-cylinder initially starts at t 400of and p 200 psia. the piston is heated until it final volume is
Calculate the time rate of change dHB/dt of angular momentum about point B when the particle passes the bottom of the guide at C.
air enters the 1.5 m2 inlet of an aircraft engine at 100kpa and 10degc with a velocity of 200ms. determine the volume
hot exhaust gases carbon dioxide are cooled from 700 k to 300 k isobarically at 500 kpa. the cooling fluid is
an air compressor takes air from outdoors at 28deg c and 101.2kpa and compresses it to 790kpa and 50 deg c. the air
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