Introduction To Physical Science

Chapter 12: Forces and Fluids

Standardized Test Practice

1
A force of 17 N is exerted on an area of 0.20 m2. What is the pressure?
A)85 Pa
B)0.68 Pa
C)3.4 Pa
D)67 Pa
2
A child throws two balls into water. One ball floats and one sinks. Which of these is correct?
A)The floating ball has a greater density
B)The floating ball has a lower density.
C)The sinking ball has greater volume.
D)The sinking ball has smaller volume.
3
According to Bernoulli's principle, which of the following happens when the speed of a fluid increases?
A)The force exerted by the fluid decreases.
B)The force exerted by the fluid increases.
C)The pressure exerted by the fluid decreases.
D)The pressure exerted by the fluid increases.
4
Why is the pressure exerted by the nail large?

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A)The nail tip is large.
B)The nail tip is small.
C)The nail has lower density than the wood.
D)The nail has higher density than the wood.
5
The pressure inside the fluid of a hydraulic system is increased by 875 Pa. What is the increase in the force exerted on a piston that has an area of 0.060 m2?
A)15 N
B)28 N
C)69 N
D)53 N
6
Which of the following exerts the greatest pressure on the ground?
A)a 35-kg boy standing on one foot
B)a 55-kg boy standing on one foot
C)a 35-kg boy standing on both feet
D)a 55-kg boy standing on both feet
7
Which of the substances will not float in water?

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A)ice and balsa wood
B)ice and lead
C)balsa wood and sugar
D)lead and sugar
8
Which of the substances has a volume of 18 cm3 if its mass is 28 g?

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A)balsa wood
B)ice
C)lead
D)sugar
9
Which of the following is explained by Pascal's principle?
A)airplane wings lifting into the air
B)a heavy ship floating in water
C)hot air rising in a fireplace
D)a hydraulic system lifting heavy weights
10
What is the mass of a 11-cm3 strip of copper if its density is 8.9 g/cm3?
A)1.2 g
B)98 g
C)8.1 g
D)42 g
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