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Density, Pressure and Pascal´s law

Total questions: 21

Worksheet time: 46mins

Name
Class
Date
1.

Snowshoes enable a person to walk on deep snow because the snowshoes

a)

decrease the person's weight on the snow

b)

increase the area over which the person's weight is distributed

c)

increase the pressure on the snow

d)

increase the buoyancy of the person

2.

A unit of pressure is called a

a)

bernoulli

b)

pascal

c)

pound

d)

meter

3.

Which type of substance does Pascal's principle deal with?

a)

solids

b)

fluids

c)

powders

d)

metals

4.

The mass per unit volume of a substance is its

a)

density

b)

buoyancy

c)

weight

d)

fluid pressure

5.

Pressure can be measured in units of

a)

newtons

b)

newtons per square meter

c)

newtons per centimeter

d)

newtons per cubic centimeter

6.
Jack has a rock. The rock has a mass of 14g and a volume of 2cm3. What is the density of the rock?
a)
7 mL
b)
7 g/cm3
c)
28 g/cm3
d)
1/7 g/cm3
7.
What is the volume of 150 grams of lead if it has a density of 11.3 g/cm3?
a)
13.3 g
b)
13.3 cm3
c)
.075 g
d)
1695 cm3
8.
The density of this material is 2 g/cm3.
There are 24 cm3  Find the total mass.
a)
12 grams
b)
48 grams
c)
12 g/cm3
d)
48 g/cm3
9.
Which box has a higher density?  
a)
Box A
b)
Box B
c)
cannot be determined
d)
they are the same
10.
Here are 5 cubic centimeters (cm3).    All together they  have a mass of 20 g what is the density?
a)
20 g/cm3
b)
80 grams
c)
 4 g/cm3
d)
80 g/cm3
11.

A mass of 10kg is on a piston (cylinder) with a diameter of 15cm. Determine what pressure is generated.

a)

5554.14 N/m2

b)

0.5554 N/m2

c)

0.014 N/m2

d)

566.17 N/m2

12.

If the density of a substance is 8 Kg/m3. Determine the volume of the substance if it has a mass of 300gr

a)

0.0375 m3

b)

37.5 m3

c)

3.75 m3

d)

0.375 m3

13.
What pressure does a 4000N horse exert on the ground if each foot is 10cm2?
a)
40 N/cm2
b)
100 N/cm2
c)
400 N/cm2
d)
10 N/cm2
14.
Which of these animals would probably cause the greatest pressure on the ground?
a)
A fat cow with big feet
b)
A fat cow with small feet
c)
 A calf with big feet
d)
A calf with small feet
15.
The pressure resulting from a force of 50 N exerted over an area of 5 m2 is
a)
10 N
b)
0.1 N
c)
10 N/m2
d)
0.1 Pa
16.

Calculate the force to be used on a brake of area 0.5cm2 if the slave cylinder has a 4cm2 area and needs 800N to stop the car.

a)

1600N

b)

6400N

c)

2000N

d)

100N

17.

If a piston has a face of 2cm2 and a force of 5N is applied what is the total pressure?

a)

2.5N/cm2

b)

0.4N/cm2

c)

10N/cm2

d)

10N/m2

18.

If a pressure of 100N/m2 is applied to a piston with an area of 1.5m2 what is the total force?

a)

150N

b)

75m2

c)

0.015N

d)

50N

19.
An elephant weighs 6000N. The total area of feet is 0.2m². What is the pressure?
a)
30000 Pa
b)
15000N/m2
c)
1200N
d)
20000Pa
20.
A force of 20 N acts over an area of 4m2. Calculate the pressure
a)
80 Pa
b)
5 Pa
c)
80 N
d)
5 N
21.

Calculate the pressure exerted by the block at the bottom, knowing that its mass is 20000g and its measures are A = 10.0cm, B = 5.0cm, C = 8.0cm

a)

2500000 Pa

b)

24525 Pa

c)

4000000 pa

d)

490500 Pa

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