PHY2048 - GENERAL PHYSICS I
REVISION QUESTIONS FOR CHAPTER 13

Below you will find a set of 5 conceptual and numerical revision questions selected randomly from lots of questions I have put together covering the material in Chapter 13, "Fluids". This includes questions on density, pressure, pressure in a fluid, buoyancy, Archimedes' principle and fluids in motion. When you have finished the quiz, click on the "Submit Quiz" button at the bottom and within seconds it will be automatically graded and the results returned to you!

To select a new set of questions click on the "Reload" or "Refresh" button on your browser. You may find some of the questions duplicated but that's the nature of a random selection. Try it a few times ... it's not fattening and you may learn something!

Many thanks to Mark Wood for producing the quiz-maker code.


Q1: A block of wood of density 0.750 ¥ 103 kg/m3 and dimensions 20.3 cm x 30.5 cm x 40.6 cm is tossed into a choppy freshwater lake. After a reasonable time, the approximate vertical dimension above the water will be

2.54 cm
5.08 cm
7.62 cm
10.2 cm
12.7 cm

Q2: A 2 kg block displaces 10 kg of water when it is held fully immersed. The object is then tied down as shown in the figure; and it displaces 5 kg of water.

What is the tension in the string?

10 N
20 N
30 N
70 N
100 N


Q3: A balloon is released from a tall building. The total mass of the balloon including the enclosed gas is 2.0 kg. Its volume is 5.0 m3. The density of air is 1.3 kg/m3. What is the magnitude of the initial acceleration of the balloon?

zero
9.8 m/s2
10.9 m/s2
22.1 m/s2
43.6 m/s2

Q4: The figure below represents the streamline flow of an incompressible fluid.

Which of the following statements is true of the velocity and/or pressure at the indicated points?

 
 
 
 
 


Q5: Using a motion sensor, Lilian finds that the acceleration of a 4 kg rock that has been dropped from the roof of a building is 6 m/s2. She concludes that the magnitude of force of air resistance acting on the rock is approximately

39.2 N
24.0 N
15.2 N
9.81 N
6.62 N

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