WorksheetsCh. 13 Test
Total questions: 13
Worksheet time: 6mins
Name
Class
Date
1.
A gymnast standing on one hand (area 0.02 m2) pushes down on the ground with a force of 600N. How much pressure does the gymnast exert on the ground?
a)
1200 Pa
b)
12 Pa
c)
30,000 Pa
d)
3000 Pa
2.
The SI unit for pressure, equal to 1 N/m2, is called the
a)
atmosphere.
b)
foot-pound.
c)
pascal.
d)
watt.
3.
The pressure exerted by a stationary fluid is determined by
a)
the area of surface containing the fluid and the type of fluid.
b)
the weight and volume of the fluid.
c)
the type of fluid and its depth.
d)
the shape of the container and the weight of the fluid.
4.
Which of the following statements about fluid pressure is false?
a)
Pressure increases as depth increases.
b)
The pressure at a given depth is constant.
c)
The pressure in a fluid is exerted downward.
d)
Liquids and gases exert pressure.
5.
Why do mountain climbers on very high peaks need cylinders of oxygen as they approach the summit?
a)
Air pressure at high altitudes is too great for normal breathing.
b)
Air on the mountaintops is too cold to breathe.
c)
The pressure of air decreases as altitude increases.
d)
The tops of the mountains extend out of the atmosphere.
6.
A water balloon can explode if squeezed tightly between two hands. Just prior to exploding, at what point of the balloon is the pressure exerted by the water greatest?
a)
The pressure exerted by the water is the same at all points of the balloon.
b)
It’s greatest at the points of contact between the balloon and the two hands.
c)
It’s greatest at the bottom of the balloon (point nearest the ground).
d)
It’s greatest at the top of the balloon (point furthest from the ground).
7.
A 5-N input force of a hydraulic system corresponds to a 40-N output force. If the area of the small piston is 11 cm², what is the area of the large piston?
a)
8 cm
b)
255 cm
c)
2200 cm2
d)
88 cm2
8.
True or False? According to Bernoulli's principle, as the speed of a moving fluid increases, the pressure within the fluid increases. True or False?
a)
True
b)
False
9.
According to Archimedes’ principle, the buoyant force acting on an object is equal to
a)
the weight of the object
b)
the pressure exerted at the bottom of the fluid.
c)
the weight of the fluid displaced by the object.
d)
the pressure exerted by the fluid at the point of contact with the object.
10.
How much fluid is displaced by an object that is floating, partially submerged, in a fluid?
a)
a volume of fluid equal to the volume of the object
b)
a volume of fluid equal to the volume of the submerged part of the object
c)
a mass of fluid equal to the mass of the object
d)
a mass of fluid equal to the mass of the submerged part of the object
11.
An unknown substance is suspended in water. What can be concluded about the substance’s density?
a)
Nothing can be concluded about the substance’s density.
b)
The substance’s density is equal to water’s density.
c)
The substance’s density is less than water’s density.
d)
The substance’s density is greater than water’s density.
12.
A 10,000-N ship is floating in the Great Salt Lake, whose salty water is denser than pure water. What is the buoyant force acting on the ship?
a)
12,000 N
b)
1000 N
c)
8000 N
d)
10,000 N
13.
How is pressure calculated in a fluid?
a)
pressure = mass * velocity
b)
pressure = force / area
c)
pressure = volume / area
d)
pressure = density * acceleration
100 %
