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G8 Force and Energy basics

Total questions: 120

Worksheet time: 3600secs

Name
Class
Date
1.

When forces on an object are balanced, what is the net force?

a)

0

b)

5

c)

10

d)

21

2.
What is the net force?
a)
400 N Up
b)
400 N Down
c)
- 400 N Down
d)
800 N Down
3.
What is the net force
a)
10 N
b)
0 N
c)
25 N
d)
1 N
4.
A _____ is a pull or a push.
a)
force
b)
friction
c)
gravity
d)
speed
5.
friction is a force that acts 
a)
in the same direction as the motion
b)
opposite to the direction of the motion
c)
opposite to the applied forces
d)
the same direction as the applied force
6.
Which one needs a greater net force to move, a kilogram of feathers or a kilogram of iron? 
a)
feathers 
b)
iron
c)
same
d)
depends on their friction
7.
You push on a tree with 20 N of force. If the tree doesn't move, the tree is pushing back on you with _____of force.
a)
20N 
b)
40N 
c)
10N 
d)
70N
8.
In a tug of war the left team pulls with a force of 200N. The right team pulls with a force of 150N.What is the net force?
a)
50N to the left.
b)
350N to the left.
c)
350N to the right.
d)
50N to the right.
9.
During which interval is the object speeding up?
a)
A to B
b)
B to C
c)
D to E
d)
E to F
10.
What is this graph showing?
a)
Constant Speed
b)
Acceleration (speeding up)
c)
Deceleration (slowing down)
d)
No motion
11.
Why is it harder for the boy in Image B to get down the hill?
a)
Motion
b)
Friction
c)
Work
d)
Displacement
12.
Jupiter has about 317 times more mass than Earth. What can you infer from this fact? 
a)
That Jupiter’s gravitational force is much weaker than on Earth’s gravitational force.
b)
That Jupiter’s gravitational force is much stronger than Earth’s gravitational force.
c)
That Jupiter’s and Earth’s gravitational forces are equal.
d)
Mass has no effect on the gravitational force between two objects
13.
A type of friction that occurs when air pushes against a moving object causing it to decelerate.
a)
surface area
b)
air resistance
c)
velocity
d)
gravity 
14.
Which of the following is an example of friction that is helpful?
a)
Brakes used on a bike
b)
Tires from a car on the road
c)
Tread on the bottom of your shoes
d)
All are examples that are helpful
15.
Which of the following is an example of friction that is harmful?
a)
Pencil marking on paper
b)
Engine parts wearing out
c)
sand placed on ice in the winter
d)
Using an eraser to erase marks
16.

Friction is a

a)

(a) non-contact force

b)

(b) contact force

c)

(c) magnetic force

d)

(d) electrostatic force

17.

Friction can be reduced by using

a)

(a) oil

b)

(b) grease

c)

(c) powder

d)

(d) all of these

18.
Any object with mass has gravity.
a)
True
b)
Sometimes
c)
False
d)
Never
19.
The force of gravity acting on an object is the object's ______.
a)
mass
b)
matter
c)
weight 
d)
friction 
20.
Which of the following never changes no matter where in the universe?
a)
weight
b)
force
c)
mass
d)
pounds
21.
A person would weigh less on on the Moon than on the Earth because . . .
a)
Moon has more mass, and therefore more gravity
b)
Moon has less mass, and therefore more gravity
c)
Moon has more mass, and therefore less gravity
d)
Moon has less mass and therefore less gravity
22.
If Earth's mass was cut in half, what would happen to your mass?
a)
increase because gravitational force increases
b)
decrease because gravitational force decreases
c)
decrease because gravitational force increases
d)
nothing, mass is not affected by gravitational force
23.
If Earth's mass was cut in half, what would happen to your weight?
a)
Increase because gravitational force increases
b)
decrease because gravitational force decreases
c)
decrease because gravitational force increases
d)
nothing, weight is not affected by gravitational force
24.

The force that pushes a plane forward

a)

lift

b)

thrust

c)

weight

d)

drag

25.

The force that pushes a plane upward

a)

lift

b)

thrust

c)

weight

d)

drag

26.

What causes an object to fall faster?

a)

Smaller surface area

b)

Larger surface area

c)

If it has a parachute

d)

If it is softer

27.

The more streamlined an object is, the...

a)

More air resistance

b)

Less air resistance

c)

Slower air resistance

d)

Faster air resistance

28.

When a falling object stops accelerating and falls at a constant speed, it is

a)

fluency

b)

constant velocity

c)

acceleration

d)

terminal velocity

29.

What is a parachute designed to maximize?

a)

Gravity

b)

Air Pressure

c)

Air Resistance

d)

Thrust

30.

When dropped from the same distance, which will fall to the floor faster?

a)
b)
31.
Energy that is stored in objects by tension is called _______ potential energy.
a)
Nuclear
b)
Gravitational
c)
Elastic
d)
Cheical
32.
Energy stored in the bonds of atoms and molecules is __________ potential energy.
a)
Chemical  
b)
Elastic
c)
Nuclear
d)
Gravitational
33.
The motion of waves, electrons, atoms, molecules, substances, and objects is called ___________ energy.
a)
Kinetic
b)
Potential
c)
Moving
d)
Kaliedic 
34.
Electromagnetic energy (such as visible waves, X-rays, gamma rays and radio waves) is called _______ energy.
a)
Heat
b)
Light
c)
Sound
d)
Electrical
35.
Energy stored in the height of an object is called ___________ potential energy.
a)
Elastic
b)
Chemical
c)
Gravitational
d)
Nuclear
36.
Energy that is stored in the nucleus of an atom is called _________ energy.
a)
Chemical
b)
Nuclear
c)
Gravitational
d)
Elastic
37.

Once object reach their_____ they permanently deform.

a)

breaking point

b)

deformation point

c)

damage point

d)

elastic limit

38.

How do you know if an object is elastic?

a)

If it springs back to its original shape.

b)

If it increases its length.

c)

If it is squishy.

d)

If it is flexible.

39.

Which is an elastic object?

a)

bread

b)

paper

c)

a basketball

d)

a shoe

40.

What is extension?

a)

The extent to which an object can be stretched without permanently altering its size or shape.

b)

A measure of how stiff or strong a spring is.

c)

The increase in the length of something.

d)

When an object springs back to its original shape.

41.

What happens if you apply a small force to a spring ?

a)

It will stretch only a small amount.

b)

It will stretch more.

c)

Springs don't stretch.

d)

What is a spring?

42.

How can we know the elastic limit?

a)

if the object is stretched too much and does not return to its original shape.

b)

If the object is stretched too much and returns to its original shape.

43.
The upward force exerted by a liquid on an object immersed in or floating on the liquid
a)
pressure
b)

buoyant force/upthrust

c)
normal force
d)
gravity
44.
What is the volume of Object X?
a)
10.0 cm3
b)
15.0 cm3
c)
20.0 cm3
d)
25.0 cm3
45.
Archimedes' Principle states that... 
a)
The buoyant force acting on an object equals the volume of the fluid displaced by the object. 
b)
The buoyant force acting on an object equals the weight (force of gravity) of the fluid displaced by the object.
c)
The buoyant force acting on an object will always be equal. 
46.
What direction is the buoyant force in?
a)
Downward
b)
Left
c)
Right
d)
Upward
47.

If the weight of an object is equal or less than the upthrust acting on it then the object would

a)

balance

b)

equal

c)

float

d)

sink

48.

If the weight of an object is greater than the upthrust acting on it then the object would

a)

balance

b)

equal

c)

float

d)

sink

49.

The object will sink if its weight is

a)

greater than upthrust on it

b)

less than upthrust acting on it

c)

equal to upthrust acting on it

d)

all of above

50.

Which line is the best line of best fit?

a)

a

b)

b

c)

c

d)

i don't see any lines

51.
A horse gallops around a circular arena.  The centripetal force on the horse is ___.
a)
directed outward
b)
tension
c)
directed toward the center of the arena
d)
9.8 N
52.

A car is rounding a bend as shown in the diagram. Which arrow correctly shows the direction of the cars velocity?

a)

A

b)

B

c)

C

d)

D

53.

A car is rounding a curve as shown in the diagram. Which arrow correctly shows the direction of the centripetal force keeping the car in circular motion?

a)

A

b)

B

c)

C

d)

D

54.

What are the units for force, F

a)

Newtons, N

b)

Joules, J

c)

Watts, W

d)

kilograms, kg

55.

What are the units for mass, m

a)

Joules, J

b)

Newtons, N

c)

kilograms, kg

d)

seconds, s

56.

What are the units for velocity, v

a)

m/s

b)

m/s2

c)

kg

d)

s

57.

What are the units of Potential Energy, PE

a)

Newtons, N

b)

Joules, J

c)

Watts, W

d)

kilograms, kg

58.

Energy stored in an object's height

a)

Chemical

b)

Mechanical

c)

Nuclear

d)

Gravitational

e)

Mechanical

59.

Select the answers that are a type of potential energy

a)

elastic energy

b)

chemical energy

c)

gravitational energy

d)

light energy

60.

A battery has what kind of energy?

a)

Chemical

b)

Potential

c)

Light

d)

Heat

61.

Energy transfer occurs when

a)

an object transfers its energy to another

b)

an object transforms into another object

c)

light energy is transferred to chemical energy

d)

electrical energy passes through a cable

62.

A rolling ball will always come to a stop, why?

a)

friction slows everything down, transforming kinetic energy to heat

b)

the ball stops because it runs out of energy

c)

the ball stops because you stopped rolling it

d)

the ball has destroyed its energy and stops moving

63.

In the skate park simulation, placing the skater higher up had what effect on gravitational potential energy?

a)

increased gravitational potential energy

b)

decreased gravitational potential energy

c)

it had no effect on the gravitational potential energy

d)

the skater had gravitational energy

64.

The Law of Conservation of Energy states that:

a)

energy can be created and destroyed

b)

energy cannot created but it can be destroyed

c)

energy cannot be created or destroyed, it transfers and transforms

d)

energy is everywhere

65.

Select the right answer that describes energy transformation in a torch (> symbol means transformation)

a)

chemical > electrical > light

b)

potential > heat energy

c)

chemical > sound > heat

d)

kinetic > chemical > electrical

66.

A roller coaster going down a hill is seeing a drop in ________ energy and a gain in _________ energy.

a)

Mechanical / Thermal

b)

Kinetic / Potential

c)

Potential / Kinetic

d)

Electrical / Sound

67.

Which two points on the Newton's Cradle Demonstrate the most potential energy?

a)

1 and 3

b)

2 and 4

c)

1 and 5

d)

3 and 5

68.

Which point on the Newton's Cradle demonstrates the most kinetic energy?

a)

1

b)

2

c)

3

d)

4

e)

5

69.

Which point on the Roller Coasters path does the cart have the least potential energy?

a)

W

b)

X

c)

Y

d)

Z

70.

Which two points on the track have more potential energy than kinetic energy?

a)

W

b)

X

c)

Y

d)

Z

71.

The chemical energy of a battery is converted to heat and light energy in a flashlight. Which of the following best explains the CONSERVATION of energy

a)

The switch of the flashlight allows energy to flow

b)

the heat and light energy are equal to chemical energy

c)

the wires carry electrical energy from the battery to the bulb

d)

after hours of use, the batteries will lose their energy

72.

When water turns a turbine connected to a generator, electricity is produced. This electricity lights homes and offices. Which of the following shows, in order, the energy transformations that occur?

a)

Chemical ---> Mechanical ---> Electrical

b)

Electrical ---> Light ---> Mechanical

c)

Mechanical ---> Electrical ---> Light

d)

Mechanical ---> Chemical ---> Light

73.

Which of these examples best shows a change from potential to kinetic energy?

a)

Water flowing over a tall cliff

b)

A metal spring being stretched out

c)

Electricity making a bulb light up

d)

A stone lying on top of a mountain

74.

Which one of them is not a fossil fuel?

a)

Coal

b)

Water

c)

Gas

d)

Oil

75.
Natural resources that are replenished by the environment in a short period of time (wind, solar power, geothermal energy, etc)
a)
Nonrenewable resources
b)
Renewable resources
c)
Solar Energy
d)
Fossil Fuels
76.
Resources that are not easily replenished by the environment.
a)
Renewable resources
b)
Nonrenewable resources
c)
Geothermal energy
d)
Energy conservation
77.
Nonrenewable resource; natural fuel such as coal, gas or natural gas that is formed in the Earth from the remains of living organisms.
a)
Biomass
b)
Hydroelectric power
c)
Solar energy
d)
Fossil fuels
78.
Renewable resource; radiant energy emitted by the sun that can be collected by solar panels.
a)
Solar energy
b)
Fossil fuels
c)
Energy conservation
d)
Biofuels
79.
Reducing energy consumption to save electricity; reduce/reuse/recycle
a)
renewable resources
b)
energy conservation
c)
solar energy
d)
nuclear power
80.

All of the following are uses of fossil fuels EXCEPT

a)

to produce electrical energy

b)

gasoline

c)

to heat homes

d)

windmills

81.

What is a renewable energy resource?

a)

an energy source that is replaced more slowly than they are used

b)

an energy source that can never be replaced

c)

an energy source that is replaced faster than they are used

d)

a fossil fuel

82.

All are advantages of using Geothermal energy EXCEPT

a)

Nonrenewable resource

b)

Renewable resource

c)

almost endless source

d)

little land needed

83.

All are disadvantages of using Water energy EXCEPT

a)

Nonrenewable resource

b)

needs dams that hurt the ecosystem

c)

needs rivers

84.

How does the mass of a bowling ball that has been rolled down the lane affect the kinetic energy?

a)

The kinetic energy does not depend on the mass of the bowling ball.

b)

The kinetic energy is increasing proportional to the mass of the bowling ball.

c)

The kinetic energy is decreasing proportional to the mass of the bowling ball.

d)

The kinetic energy is increasing proportional to the square of the mass of the bowling ball.

85.

According to the law of conservation of energy, the total amount of energy in the universe

a)

remains constant

b)

changes constantly

c)

increases

d)

decreases

86.

What is the GPE at point A

a)

14 J

b)

12 J

c)

6 J

d)

8 J

87.

What is the KE at point B?

a)

14 J

b)

12 J

c)

6 J

d)

8 J

88.

What is the Total Energy of the system?

a)

14 J

b)

12 J

c)

6 J

d)

8 J

89.

What is the Total Mechanical Energy at point A?

a)

500,000 J

b)

400,000 J

c)

200,000 J

d)

50,000 J

90.

What is the Kinetic Energy at point B?

a)

500,000 J

b)

400,000 J

c)

300,000 J

d)

50,000 J

91.

What is the Kinetic Energy at point C?

a)

500,000 J

b)

400,000 J

c)

300,000 J

d)

50,000 J

92.

What is the GPE at point E?

a)

500,000 J

b)

250,000 J

c)

300,000 J

d)

100,000 J

93.

What is the Total Energy at the top?

a)

15,000 J

b)

3,750 J

c)

7,500 J

d)

11,250 J

94.

What is the KE 1/4th of the way down?

a)

15,000 J

b)

3,750 J

c)

7,500 J

d)

11,250 J

95.

What is the KE 1/2 of the way down?

a)

15,000 J

b)

3,750 J

c)

7,500 J

d)

11,250 J

96.

What is the KE 3/4th of the way down?

a)

15,000 J

b)

3,750 J

c)

7,500 J

d)

11,250 J

97.

What is the GPE at the top?

a)

50 J

b)

25 J

c)

0 J

d)

100 J

98.

What is the KE half way down?

a)

50 J

b)

25 J

c)

0 J

d)

100 J

99.

What is the Total Energy at the bottom?

a)

50 J

b)

25 J

c)

0 J

d)

100 J

100.

Elastic potential energy is energy stored in an object, such as a spring, due to the object being stretched or compressed. In which position is it most likely that the spring has lost its elastic potential energy?

a)

W

b)

Y

c)

X

d)

Z

101.

Which object has elastic potential energy?

a)

a hanging leaf

b)

a burning coal

c)

a rolling ball

d)

a stretched bow

102.

When does a yo-yo have the most potential energy?

a)

When it's moving at its top speed.

b)

When it's moving between its highest and lowest points.

c)

When it's at its lowest point.

d)

When it's at its highest point.

103.

As the ball hits the ground, ..................energy is transferred to ....................... enrgy.

a)

gravitational to kinetic

b)

kinetic to chemical

c)

kinetic to elastic

d)

kinetic to gravitational

104.

What is this diagram called?

a)

Stankey Diagram

b)

Sankey Diagram

c)

Smelly Diagram

d)

Some sort of Diagram

105.
Where does most of the energy go in this transformation.
a)
Electrical energy
b)
Light
c)
Heat
d)
other
106.

What type of device might this Sankey be about?

a)

A very efficient LED light bulb

b)

A very inefficient incandescent light bulb

c)

A coal power plant

d)

A wind turbine

107.
What might a title be for this sankey?
a)
Electrical energy
b)
Efficient light bulb
c)
25 Joules of heat
d)
Sankey for a good heater.
108.

A kettle uses 100J of electrical energy to produce 7J of sound energy and 93J of thermal energy. How efficient is the kettle?

a)

100%

b)

7%

c)

93%

d)

95%

109.

A washing machine uses 250J of electrical energy to produce 125J of useful energy. How efficient is it?

a)

5%

b)

50%

c)

55%

d)

100%

110.

A hairdryer uses 300J of energy to produce 60J of sound energy and 240J of thermal energy. Calculate it's efficiency.

a)

80%

b)

90%

c)

20%

d)

100%

111.
The law of energy conservation says the total energy before the change _______ the total energy after it
a)
is less than
b)
is more than
c)
affects
d)
equals
112.
In energy transformations, "wasted energy" usually takes what form?
a)
heat
b)
chemical energy
c)
light
d)
sound waves
113.

Which of these equations is correct?

a)

efficiency = useful energy transferredtotal energy transferredefficiency\ =\ \frac{useful\ energy\ transferred}{total\ energy\ transferred}  

b)

efficiency = total energy transferreduseful energy transferredefficiency\ =\ \frac{total\ energy\ transferred}{useful\ energy\ transferred}  

c)

energy = efficiency ×100%energy\ =\ efficiency\ \times100\%  

d)

efficiency = wasted energy transferredtotal energy tranferredefficiency\ =\ \frac{wasted\ energy\ transferred}{total\ energy\ tranferred}  

114.

How much energy is wasted as sound?

a)

350J

b)

450J

c)

250J

d)

550J

115.

How much energy is wasted as thermal energy

a)

24

b)

16

c)

14

d)

12

116.

What is the efficiency?

a)

2%

b)

20%

c)

5%

d)

15%

117.
Which fraction best describes, of the part of the gasoline that is put into a car, that actually makes the car move. 
a)
4/10
b)
1/4
c)
2/4
d)
3/5
118.
Assume there are 10 pieces of energy.  Which is a close approximation to the number of pieces that transform into kinetic energy?
a)
1
b)
3
c)
6
d)
10
119.

Fossil fuels are nonrenewable resources because they

a)

take millions of years to form

b)

are not re-useable

c)

are in high demand

d)

pollute the air

120.
What happens when two north poles of a magnet are placed together?
a)
they repel
b)
they attract
c)
they cancel each other out
d)
the strength of the magnet is doubled

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