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Worksheets

Fluids

Total questions: 20

Worksheet time: 24mins

Name
Class
Date
1.
If an object sinks in a fluid, _____.
a)
the density of the fluid is greater than the density of the object
b)
the density of the fluid is less than the density of the object
c)
the density of the fluid is equal to the density of the object
d)
density has nothing to do with whether an object sinks or floats, only which state of matter the object is
2.
Water pressure increases as depth increases. 
a)
True
b)
False
3.

The term fluids generally applies to:

a)

solid and liquid

b)

liquid and gas

c)

solid and plasma

d)

water only

4.

What is the SI unit use for hydraulic pressure?

a)

Kg/m3

b)

Pa

c)

kg m-3

d)

N m2

5.

What is the formula for pressure?

a)

P = F / A

b)

P = F A

c)

P = A / F

d)

F = P / A

6.

The pressure resulting from a force of 50 N exerted over an area of 5 m2 is

a)

10 Nm2

b)

0.1 Nm2

c)

10 N m-2

d)

0.1 Pa

7.
In what direction(s) does air exert pressure?
a)
everywhere
b)
no where
c)
there is no pressure
d)
downward
8.

The upward force exerted by a fluid is called the...

a)

buoyancy force

b)

density force

c)

fluidity force

d)

normal force

9.
Fluid pressure is directed
a)
in all directions.
b)
only upward.
c)
only downward.
d)
always sideways.
10.

A rock dropped into a glass of water raises the water level by 40 milliliters. What can you infer about the rock?

a)

It has a mass of 40 grams

b)

It has a desity of 40 grams per milliliter

c)

It has a volume of 40 milliliters

d)

It has a weight of 40 pounds

11.

How does an object's density affect the buoyant force acting on it?

a)

The more dense the object, the greater the buoyant force

b)

The less dense the object, the greater the buoyant force

c)

Density is equivalent to buoyant force

d)

Object density has no effect on buoyant force

12.
If the weight of the water displaced is the same as the weight of the object placed in the water, the object will sink.
a)
True
b)
False
13.

from the image below which represents the correct force of the fluid pressure on solid objects ...

a)
b)
c)
d)
e)
14.

Buoyant force acts in the ________________ of gravity, making things feel lighter

a)

same direction

b)

opposite direction

15.

A helium balloon floats away because helium is _______ dense than air

a)

more

b)

less

16.
Which liquid is the least dense?
a)
oil
b)
water
c)
syrup 
d)
plastic bottle
17.
The density of water is 1g/cm3. A substance will float if its density is less than that of water. Which of the following substance will float?
a)
substance 1
b)
substance 2
c)
substance 3
d)
substance 4
18.
which of the following statements is true?
a)
oil floats on water because oil is less dense than water
b)
oil does not float on water because water is more dense
c)
water floats on oil because water is less dense
19.
Hot air is less dense than cold air
a)
true
b)
false
20.

The mass and radius of a hypothetical planet, both are 10 times that of Earth. The acceleration due to gravity on the planet is (in m/s2)

a)

more than 9.8

b)

9.8

c)

less than 9.8

d)

can't be determined

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