 # 6 the small piston of a hydraulic lift fig has a

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6.The small piston of a hydraulic lift (Fig. ) has a cross-sectional area of 3.00 cm2, and its large pistonhas a cross-sectional area of 200 cm2. What downward force of magnitude F1must be applied to thesmall piston for the lift to raise a load whose weight is Fg5 15.0 kN?
Physics I -Week Eight7.What must be the contact area between a suction cup (completely evacuated) and a ceiling if the cupis to support the weight of an 80.0-kg student?8.A swimming pool has dimensions 30.0 m x 10.0 m and a flat bottom. When the pool is filled to adepth of 2.00 m with fresh water, what is the force exerted by the water on (a) the bottom? (b) Oneach end? (c) On each side?9.A table-tennis ball has a diameter of 3.80 cm and average density of 0.084 0 g/cm3. What force isrequired to hold it completely submerged under water?10.The gravitational force exerted on a solid object is 5.00 N. When theobject is suspended from a spring scale and submerged in water, thescale reads 3.50 N (Fig.). Find the density of the object
Physics I -Week Eight11.Water flowing through a garden hose of diameter 2.74 cm fills a 25-L bucket in 1.50 min. (a) Whatis the speed of the water leaving the end of the hose? (b) A nozzle is now attached to the end of thehose. If the nozzle diameter is one-third the diameter of the hose, what is the speed of the waterleaving the nozzle?12.A large storage tank, open at the top and filled with water, develops a small hole in its side at a point16.0 m below the water level. The rate of flow from the leak is found to be 2.50 x1023m3/min.Determine (a) the speed at which the water leaves the hole and (b) the diameter of the hole.13.Water moves through a constricted pipe in steady, ideal flow. At the lower point shown in Figure,the pressure is P1 = 1.75 x 104Pa and the pipe diameter is 6.00 cm. At another point y = 0.250 mhigher, the pressure is P2 =1.20x 104Pa and the pipe diameter is 3.00 cm. Find the speed of flow (a)in the lower section and (b) in the upper section. (c) Find the volume flow rate through the pipeObjective
Physics I -Week Eight14.Figure shows a stream of water in steady flow from a kitchen faucet. At thefaucet, the diameter of the stream is 0.960 cm. The stream fills a 125-cm3container in 16.3 s. Find the diameter of the stream 13.0 cm below theopening of the faucet.15.The bodyofa man whose weight is 690 N contains about 5.2 × 10-3m3of blood. (a) Find theblood’s weight and (b) express it as a percentage of the body weight.16.In thehydrauliccar lift, the input piston on the left has a radius ofr1= 0.0120 m and a negligibleweight. The output plunger on the right has a radius of2= 0.150 m. The combined weight of thecar and the plunger is 20 500 N. Since the output force has a magnitude of2= 20 500 N, itsupports the car. What is the magnitude1of the input force that is needed so thatF2rFF?

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Term
Spring
Professor
khaled
Tags
Pressure measurement, Fundamental physics concepts
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