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Outcome 8 Revision

Total questions: 48

Worksheet time: 1hrs 2mins

Name
Class
Date
1.
You and your dad are moving the couch from one side to another. Your dad pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?
a)
60 N right
b)
10 N left
c)
60 N right
d)
50 N left
2.
Which one is balanced?
a)
Top
b)
Bottom
c)
Both
d)
Cannot be determined
3.
What is the net force?
a)
17 N Right
b)
3 N Right
c)
3 N Left
d)
17 N Left
4.
What are vectors?
a)
quantities described by both speed and movement
b)
quantities described by both velocity and acceleration
c)
quantities described by both magnitude and direction
d)
quantities described by both force and gravity
5.
The combination of all forces acting on an object is called __________
a)
Parallelogram Rule
b)
Net Force
c)
Vector Quantity
d)
All the Jedi's using their abilities together
6.
Static Equilibrium means ____
a)
Objects at rest
b)
moving objects
c)
that which is in outer space
d)
electrical balance
7.
Dynamic Equilibrium means ___________
a)
Objects at rest
b)
objects moving at constant speed in a straight-line path 
c)
force of friction
d)
flying in outer space
8.

4- Equilibrium

a)

Is a measurement of the force required to make an object stop moving.

b)

Is a state in which forces acting on an object balance each other by having equally strong yet opposite effects.

c)

Is a continued movement in a substance or field of energy.

d)

Is a natural attractive force that that makes particles come together, and is stronger among larger particles.

9.

What is the resultant force?

a)

40N, Left

b)

40N, Right

c)

0N, Balanced

d)

75N, Right

10.

Which method is used to find the resultant of the two forces?

a)

Parallelogram of forces

b)

Triangle of forces

c)

Resolution

d)

Square of forces

11.

Which method is used to find the resultant of two coplanar forces acting at a point?

a)

Parallelogram of forces

b)

Triangle of forces

c)

Cosine Rule

d)

Resolution of Forces

12.

What is the anti-clockwise torque (moment)acting on this crane?

a)

80,000Nm

b)

100,000Nm

c)

120,000Nm

d)

140,000Nm

13.

Two masses of mass 10.0 and 6.0 kg are hung from massless strings at the end of a light rod. The rod is virtually weightless. A pivot (fulcrum) is placed off center and the system is free to rotate. If the 6.0 kg mass is 4.0 m away from the pivot, how far away is the 10.0 kg mass if the system is not rotating?

a)

0.42 m

b)

2.4 m

c)

4.8 m

d)

4.2 m

14.

The moment of a force causes an object to

a)

move forward

b)

move backward

c)

stop moving

d)

turn about a fixed point

15.

When an object is in equilibrium, which equation is true?

a)

Clockwise moment = anticlockwise moment

b)

Clockwise moment + anticlockwise moment = 0

c)

Clockwise moment / anticlockwise moment = 0

d)

Clockwise moment + anticlockwise moment = resultant force

16.

What is the size of the moment shown by the black arrow?

a)

30 Nm

b)

36 Nm

c)

40 Nm

d)

60 Nm

17.

The point through which the whole weight of the body acts is called

a)

Inertial Point

b)

Center of gravity

c)

Centriod

d)

Central point

18.

Where the center of gravity of a circle lies?

a)

At its centre

b)

Anywhere on its radius

c)

Anywhere on its circumference

d)

Anywhere on its diameter

19.

What is one way you might increase the stability of an object?

a)

Lower the center of gravity

b)

Raise the center of gravity

c)

Increase the height of the object

d)

Shorten the base of the object

20.

The centre of gravity for an aircraft is important because it impacts the aircraft's stability.

a)

True

b)

False

21.

What is the unit of pressure?

a)

newton

b)

joules

c)

pascal

22.

_____________ is the amount of force pushing on a certain area.

a)

weight

b)

mass

c)

pressure

23.

Pressure can be exerted by solids, liquids and gases.

a)

TRUE

b)

FALSE

24.
A device that is used to measure atmospheric pressure is a ___________.
a)
barometer
b)
thermometer
c)
kilometer
d)
micrometer
25.
Air pressure is greater _______.
a)
at the top of the mountain
b)
at the bottom of the mountain
c)
at the center of the mountain
26.

The pressure resulting from a force of 100 N exerted over an area of 25 m2 is

a)

125 N

b)

2500 N

c)

4 N/m2

d)

2500 N/m2

27.

Which of the following is the correct relationship between gauge pressure, atmospheric pressure, and absolute pressure?

a)

Absolute pressure = Atmospheric pressure + Gauge pressure

b)

Absolute pressure = Atmospheric pressure - Gauge pressure

c)

Gauge pressure = Absolute pressure + Atmospheric pressure

d)

Gauge pressure = Atmospheric pressure

28.

The gauge pressure on a small sedan measures 32 psi. What is the absolute pressure assuming the car is at sea level with an atmospheric pressure of 14.7 psi?

a)

46.7 psi

b)

44.7 psi

c)

14.7 psi

d)

can not be determined

29.

What happens to liquid pressure as you go deeper under water?

a)

it increases

b)

it decreases

c)

it stays the some

d)

no soup for you!

30.

Calculate the pressure exerted by the water on the fish.

[Density of water = 1 000 kg m−3 and g = 10N/kg]

a)

5 × 104 Pa

b)

5 × 107 Pa

c)

5 × 106 Pa

d)

5 × 10-1 Pa

31.

The diagram shows a cross-section of a pool. The density of water in the pool is 1000 kg m-3.

What is the pressure exerted by the water at X?

a)

2.5 x 102 Pa

b)

2.5 x 10-3 Pa

c)

4.0 x 103 Pa

d)

4.0 x 104 Pa

32.

What does the unit atmosphere, atm, measure?

a)

Pressure

b)

Temperature

c)

Volume

d)

Moles

33.
What is 50 °C in Kelvin?
a)
223
b)
323
c)
100
d)
50
34.

Absolute zero is

a)

0 K

b)

where there is no molecular movement

c)

the coldest temperature possible

d)

all of these

35.
The following graph shows ____ relationship. 
a)
Direct
b)
Inverse
36.
Boyle's law :  The pressure and volume of a gas show a _____ relationship. 
a)
Inverse 
b)
Direct 
37.
You have a gas that has a pressure of 2 ATM and a volume of 10L.  What would be the new volume if the pressure was changed to 1 ATM?
a)
5 L
b)
20 L
c)
It would stay at 10L
d)
1 L
38.
If the temperature of a gas increase, the pressure...
a)
Decreases
b)
Increases
c)
Does not change
39.
A gas occupies 4.98 L at 2.6 atm of pressure. What volume does it occupy at 1.8 atm pressure?
a)
12.9 L
b)
0.72 L
c)
7.2 L
d)
3.44 L
40.
What type of relationship to pressure and volume have?
a)
direct
b)
inverse
c)
no relationship
d)
I don't know
41.

(Charles Law) There are 40 liters of helium in a balloon at 100 K. If the temperature of the balloon is increased to 200 K, what will the new volume of the balloon be?

a)

80 L

b)

45 L

c)

54 L

d)

45.33 L

42.
What law combines all 3 factors (pressure, temperature, and volume)
a)
Combined Gas Law
b)
Charle's Law
c)
Boyle's Law
d)
Avagadros Ideal Gas Law
43.

The density of water is

a)

13600 kg/m3

b)

1000 kg/m3

c)

7800 kg/m3

d)

625 kg/m3

44.

To convert the density of kg m-3 into g cm-3, we divide the quantities with

a)

100

b)

10

c)

200

d)

1000

45.

You have a rock with a volume of 15cm3 and a mass of 45 g. What is its density?

a)

3.0 g/cm3

b)

0.3 g/cm3

c)

30 g/cm3

d)

-30 g/cm3

46.

Find the mass of an object with volume 300 cm3 and density 5 g/cm3. Give your answer in grams.

a)

1000 grams

b)

500 grams

c)

1500 grams

d)

750 grams

47.

The density of aluminium is 19300 kg/m3. What is its relative density? Will it float or sink in water?

a)

19.3. Sink.

b)

0.05. Float

c)

19.3. Float.

d)

0.05. Sink

48.
Equal in magnitude, but 180 degrees opposite in direction to the resultant vector is the _____ vector.
a)
total horizontal component
b)
total vertical component
c)
equilibrant

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