NAME_______ PHYSICS
PRESSURE practic2

USE YOUR OWN NOTES AND WORKSHEETS

1) Normal atmospheric pressure is enough to lift a column
of gasoline _____ a column of mercury

A)
higher than B) lower than C) same height as

2) The buoyant force acting upon an object submerged in a
fluid does not depend on

A)
The weight of the object B)
The weight of the displaced fluid

C)
The volume of the object D)
The volume of the displaced fluid

3) For which water-filled container is the pressure
greatest at the point marked X?

A B C D

4) A municipal water supply is provided by a tall water
tower. Water from this tower flows

to a building. How does the water flow out of a faucet on
the ground floor of a building

compare with the water flow out of an identical faucet on
the second floor of the building?

a) Water flows more rapidly out of the ground-floor
faucet.

b) Water flows more rapidly out of the second-floor
faucet.

c) Water flows at the same speed out of both faucets.

d) The speed of the water flow cannot be determined unless
the height of the water tower is known.

5) Which factor will NOT increase the lift on a moving
airplane wing?

A) Increasing the surface area

B) Increasing the curve of the wing

C) Increasing the velocity

D) Increasing the weight

6) Which is true about an airplane?

A) Increasing the angle of attack decreases the drag

B) Increasing the velocity decreases the pressure
difference between the top and bottom of the wing.

C) Increasing the thrust decreases the lift

D) Increasing the weight decreases the thrust

7) Which of the following statements about floating
objects is correct?

a) The object's density is greater than the density of the
fluid on which it floats.

b) The object's density is equal to the density of the fluid
on which it floats.

c) The displaced volume of fluid is greater than the
volume of the object.

d) The buoyant force equals the object's weight.

8) Which block weighs the most?

A) B) C) D)
all weigh the same

9) On which block is the buoyant force equal to the weight
of the block?

A) B) C) D)
All three

10) For which block is the density equal to that of water?

A) B) C) D)
All three

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11)`

Gasoline is siphoned from a car tank, as shown in the
figure above. The atmospheric

pressure is the same at either end, and the height
difference from the top of the tank to the bottom of the siphon is 1.0 m.
Utilize Bernoulli's equation to determine the velocity of flow of gasoline out
of the tube.

a) 1.1 m/s b)
2.2 m/s c)
4.4 m/s d)
8.8 m/s

12) Each tire of an automobile has an area of 0.026 m2 in contact with the ground. The

weight of the automobile is 2.6 * 10 4 Newtons. What is the pressure in the
tires?

a)
3.1 * 10 6 Pa b) 6.5 * 10 3 Pa c) 2.5 * 10 5 Pa d) 1.0 * 10 6 Pa

13) A table-tennis ball has an average density of 0.084
g/cm 3 and a diameter of 3.8 cm. (Vol
= 4/3*pi*r^3)What force can submerge the ball in water? (Dw = 1.00 g/cm 3 )

a)
1.0 N b) 0.79 N c) 0.52 N d) 0.26 N

14) Explain how Bernoulli’s principle can be thought of as
restating conservation of energy

15-16) How much faster does the air on top of a 100 kg
glider that has a surface area of 10 meters squared have to move in order to
lift it?

Show work

17-18) A block of aluminum metal and a block of denser
lead of unknown volume are both submerged in water, and on a scale, found to
have an apparent weight of one ton. Which has the greater mass? explain your
answer...