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Worksheets

Fluids and materials

Total questions: 19

Worksheet time: 50mins

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.

What does viscosity mean?

a)

How close the particles are together.

b)

The amount of matter in a substance.

c)

How easily a fluid flows.

d)

How dense a fluid is.

3.
Bernoulli's principle states that the pressure in a fluid ____________as the fluid's velocity _____________
a)
decreases, decreases
b)
increases, increases
c)
decreases, increases
d)
goes up, goes up
4.
Air flowing over an aircraft wing
a)
Goes faster on the upper surface than the lower surface
b)
Creates a lot of drag
c)
Leads to low pressure above the wing
d)
Goes slower on the upper surface than the lower surface
5.
An irregular or unpredictable flow of fluid is known as
a)
turbulence
b)
opulence
c)
flatulence
d)
arquebus
6.

Based on their density, which substance will sink in water?

a)

olive oil 0.92 g/cm3

b)

gasoline 0.69 g/cm3

c)

skim milk 1.04 g/cm3

d)

ethanol (fuel) 0.789 g/cm3

7.

Determine the weight of an object that measures 2.4 m2 and exerts 398 Pa of pressure.

a)

398 N

b)

955 N

c)

69.2 N

d)

166 N

8.

An object displaces 30 mL of fluid. The weight of the fluid displaced is 7 N. The weight of the object is 9 N. What is the upthrust force that is acting on the object?

a)

30 N

b)

2 N

c)

7 N

d)

9 N

9.

Upthrust is defined as...

a)

the weight of the fluid displaced

b)

the volume of the fluid displaced

c)

The weight of the object

d)

Lift

10.

What is the volume of a sphere?

a)

 4πr24\pi r^2  

b)

 43πr3\frac{4}{3}\pi r^3  

c)

 34πr2\frac{3}{4}\pi r^2  

d)

 πr2\pi r^2  

11.

For a small sphere falling at terminal velocity, which statement is true?

a)

Weight = upthrust + viscous drag

b)

Weight + upthrust = viscous drag

c)

Weight + viscous drag = upthrust

d)

Weight = upthurst

12.

Ductile

a)

elastic deformation under tensile stress

b)

plastic deformation under tensile stress

c)

elastic deformation under compressive stress

d)

plastic deformation under compressive stress

13.

Malleable

a)

elastic deformation under tensile stress

b)

plastic deformation under tensile stress

c)

elastic deformation under compressive stress

d)

plastic deformation under compressive stress

14.

Tough

a)

Energy required to break or fracture a material

b)

Energy required to cause plastic deformation

c)

Energy required to cause elastic deformation

d)

Area above a stress strain graph

15.

Youngs modulus

a)

Stress x strain

b)

Strain / stress

c)

Stress / strain

d)

Strain x stress

16.

Stiffer materials...

a)

Have a steeper gradient

b)

Have a smaller gradient

c)

Have a non-linear gradient

d)

Deform easily

17.

The area under a stress strain graph gives

a)

Work done

b)

Work done per unit volume

c)

Volume

d)

Force

18.

What happens to the velocity of a fluid when the diameter of a pipe is decreased?

a)

Stays the same

b)

Decreases

c)

Reaches terminal velocity

d)

Increases

19.

Who is having the most fun?

a)
b)
c)
d)