2300_Course_Manual_F2010

# 3 rpm 196 n 14 decide whether each of the following

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42.3 RPM, 19.6 N) 1.4 Decide whether each of the following statements is true or false. (a) 1 lb m always weighs 1 lb f (b) 1 lb m weighs 1 lb f (approximately) on earth (c) the weight of a quantity of material is independent of its location (d) the mass of a quantity of material is independent of its location. 1.5 Indicate the correct answer: A fluid is a substance that: (a) always expands until it fills any container (b) is practically incompressible (c) cannot be subjected to shear forces (d) cannot remain at rest under action of any shear force (e) has the same shear stress at a point regardless of its motion 1.6 Complete the following table of equivalents, assuming that the reference atmospheric pressure is 14.696 psia (the value at sea level for the standard atmosphere): psia psig psfa psfg kPa(a) kPa(g) 14.696 25 985 2116 101.32 10 5 1.7 The drawing shows an automobile held up by a hydraulic lift. The hydraulic piston and the automobile together have a mass of 3000 kg. The hydraulic piston has a diameter of 0.25 m. What is the pressure in the hydraulic fluid at point A? (Ans. 600 kPa)

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