Free Printable Energy Work and Simple Machines Optional Review

Free Printable Worksheets

Worksheets

Energy Work and Simple Machines Optional Review

Total questions: 65

Worksheet time: 50mins

Name

Class

Date

1.

Which statement best defines energy?

a)

The ability to do work or cause change

b)

Energy stored because of an object’s position or condition

c)

Energy due to an object’s motion

d)

Energy stored in the bonds of substances

2.

Which statement best defines kinetic energy?

a)

Energy due to motion

b)

Energy stored in chemical bonds

c)

Energy stored because of position or condition

d)

The rate at which work is done

3.

Which statement best defines potential energy?

a)

Stored energy due to position or condition

b)

Energy of motion

c)

Energy released by burning fuel

d)

Energy transferred by waves

4.

Determine which type of potential energy each item describes. A pogo stick

a)

Elastic potential energy

b)

Chemical potential energy

c)

Gravitational potential energy

5.

Determine which type of potential energy each item describes. Stretching a bow and arrow

a)

Elastic potential energy

b)

Chemical potential energy

c)

Gravitational potential energy

6.

Determine which type of potential energy each item describes. Sling shot

a)

Elastic potential energy

b)

Chemical potential energy

c)

Gravitational potential energy

7.

Determine which type of potential energy each item describes. Heating wood

a)

Elastic potential energy

b)

Chemical potential energy

c)

Gravitational potential energy

8.

Determine which type of potential energy each item describes. Using gas to fuel a car

a)

Elastic potential energy

b)

Chemical potential energy

c)

Gravitational potential energy

9.

Determine which type of potential energy each item describes. A lemon in a tree falling

a)

Elastic potential energy

b)

Chemical potential energy

c)

Gravitational potential energy

10.

Determine which type of potential energy each item describes. Photosynthesis

a)

Elastic potential energy

b)

Chemical potential energy

c)

Gravitational potential energy

11.

Determine which type of potential energy each item describes. Holding a ball and dropping it

a)

Elastic potential energy

b)

Chemical potential energy

c)

Gravitational potential energy

12.

Anything that can fall has ______ potential energy.

a)

gravitational

b)

mechanical

c)

chemical

d)

elastic

13.

The law of ___________ states that energy may change form, but it cannot be created or destroyed under ordinary conditions.

a)

conservation

b)

transformation

c)

potential

d)

kinetic

14.

Energy stored in chemical bonds is __________ energy.

a)

chemical

b)

mechanical

c)

kinetic

d)

elastic

15.

Energy that is stored is called _________ energy.

a)

potential

b)

kinetic

c)

thermal

d)

nuclear

16.

_________ energy is energy in motion.

a)

kinetic

b)

potential

c)

chemical

d)

elastic

17.

An object's total amount of potential and kinetic energy is _______ energy.

a)

mechanical

b)

thermal

c)

gravitational

d)

nuclear

18.

_________ energy can stretch or compress.

a)

elastic

b)

chemical

c)

potential

d)

kinetic

19.

Directions: Use your knowledge of energy to answer the questions below. Write the equation for mechanical energy.

a)

$ME = PE + KE$

b)

$ME = PE \times KE$

c)

$ME = PE - KE$

d)

$ME = KE - PE$

20.

Directions: Use your knowledge of energy to answer the questions below. What is the best explanation the law of conservation of energy.

a)

Energy cannot be created or destroyed; it can change form.

b)

Energy is always increasing in a closed system.

c)

Energy can be created by machines but not destroyed.

d)

Energy only exists as heat.

21.

Directions: Use your knowledge of energy to answer the questions below. Give two of your own examples of a change in energy.

a)

A roller coaster converts potential energy to kinetic energy as it descends.

b)

A lit bulb converts electrical energy to light and heat.

c)

A book resting motionless on a table.

d)

A balanced rock that never moves.

22.

Directions: Use your knowledge of energy to answer the questions below. How do we obtain energy from plants?

a)

By eating plants (or animals that eat plants), releasing stored chemical energy.

b)

By touching leaves to absorb electrical energy.

c)

By breathing near plants to gain kinetic energy.

d)

By listening to plants to get sound energy.

23.

Directions: Use your knowledge of energy to answer the questions below. What are some other sources of energy?

a)

Sunlight (solar)

b)

Wind

c)

Moving water (hydroelectric)

d)

Geothermal heat

e)

Fossil fuels

24.

Using your knowledge of work and power, explain how the person paddling a canoe is doing work and how the canoe’s shape makes paddling easier.

a)

By applying a force to move the canoe a distance; the streamlined hull reduces water resistance, making paddling easier.

b)

By holding the paddle still so no energy is transferred; the wider hull increases drag, making paddling easier.

c)

By applying force without movement; the flat sides increase friction with water, making paddling easier.

d)

By moving only the paddle in place; the boxy hull creates more turbulence, making paddling easier.

25.

Based on the equation $W = F \times d$ , what does W stand for?

a)

Work

b)

Weight

c)

Watts

d)

Waves

26.

Based on the equation $W = F \times d$ , what does F stand for?

a)

Force

b)

Friction

c)

Frequency

d)

Fuel

27.

Based on the equation $W = F \times d$ , what does d stand for?

a)

Distance

b)

Density

c)

Diameter

d)

Displacement of water only

28.

Using the equation $P = W/t$ , what does P stand for?

a)

Power

b)

Pressure

c)

Potential energy

d)

Percent

29.

Using the equation $P = W/t$ , what does W stand for?

a)

Work

b)

Watts

c)

Weight

d)

Width

30.

Using the equation $P = W/t$ , what does t stand for?

a)

Time

b)

Temperature

c)

Torque

d)

Thickness

31.

Bobby pushes the wheelbarrow 10 m with a force of 200 N. How much work did he do? Use $W = F \times d$ .

a)

200 J

b)

2000 J

c)

20{,}000 J

d)

2 J

32.

Sarah expends 750 J of energy skating around town for 30 minutes. What was her power output? Use $P = W/t$ and convert time to seconds.

a)

0.42 W

b)

25 W

c)

405 W

d)

0.04 W

33.

A machine is best described as which statement?

a)

A device that makes work easier by changing the size or direction of a force or the distance over which it acts

b)

Any object that uses electricity to move

c)

A device that increases energy without losses

d)

A tool that always reduces the time needed to do a task

34.

Two forces are involved when a machine does work. Select both.

a)

Input force

b)

Output force

c)

Gravitational force only

d)

Thermal force

35.

What is efficiency in the context of machines?

a)

The ratio of useful output work to input work, often expressed as a percent

b)

The maximum speed a machine can reach

c)

The total energy stored in the machine

d)

The amount of force a machine can apply regardless of input

36.

Which of the following are examples of work made easier by machines? Select all that apply.

a)

Using a pulley to lift a heavy load

b)

Pushing a box up a ramp instead of lifting it straight up

c)

Carrying groceries without any device

d)

Using a wheelbarrow to move soil

37.

Which equation correctly represents mechanical advantage (MA)?

a)

MA = output force ÷ input force

b)

MA = input force ÷ output force

c)

MA = work ÷ time

d)

MA = force × distance

38.

What is the best definition of input force?

a)

The force applied to a machine by the user

b)

The force the machine exerts on the object

c)

The gravitational pull on the machine

d)

The force lost to friction only

39.

What is the best definition of output force?

a)

The force the machine exerts on the object

b)

The force applied to the machine by the user

c)

The friction opposing motion inside the machine

d)

The weight of the machine itself

40.

What is a simple machine? Choose the best definition.

a)

A device that changes the size or direction of a force to make work easier, with few or no moving parts

b)

A system that produces electrical energy from chemical reactions

c)

Two or more devices combined to perform complex tasks

d)

Any machine powered by electricity rather than by people

41.

What is a compound machine? Choose the best definition.

a)

A single device that changes force without moving parts

b)

Two or more simple machines working together to perform a task

c)

An object that stores potential energy without doing work

d)

A machine that only changes the direction of a force

42.

Read each statement and choose the simple machine it best describes: Bar that is free to pivot around a fixed point.

a)

lever

b)

wheel & axle

c)

inclined plane

d)

screw

e)

wedge

43.

Read each statement and choose the simple machine it best describes: Inclined plane wrapped in a spiral around a cylindrical post.

a)

pulley

b)

inclined plane

c)

screw

d)

lever

e)

wheel & axle

44.

Read each statement and choose the simple machine it best describes: An inclined plane with one or two sloping sides.

a)

wheel & axle

b)

wedge

c)

pulley

d)

screw

e)

lever

45.

Read each statement and choose the simple machine it best describes: Grooved wheel with a rope, chain, or cable running along the groove.

a)

pulley

b)

wedge

c)

inclined plane

d)

lever

e)

screw

46.

Read each statement and choose the simple machine it best describes: An axle attached to the center of a wheel, so they rotate together.

a)

inclined plane

b)

wheel & axle

c)

pulley

d)

wedge

e)

screw

47.

Read each statement and choose the simple machine it best describes: Sloping surface used to raise objects.

a)

lever

b)

pulley

c)

inclined plane

d)

wheel & axle

e)

screw

48.

Explain the difference between a fixed and moveable pulley by choosing the statement that best describes each: A fixed pulley changes the direction of the effort force but does not provide mechanical advantage; a moveable pulley travels with the load and provides mechanical advantage.

a)

Fixed pulleys and moveable pulleys both increase force equally and neither changes direction

b)

A fixed pulley changes direction without multiplying force, while a moveable pulley multiplies force by moving with the load

c)

A fixed pulley multiplies force more than a moveable pulley

d)

Neither fixed nor moveable pulleys affect force or direction

49.

Identify the arrangement that defines a first-class lever.

a)

Fulcrum between effort and load

b)

Load between fulcrum and effort

c)

Effort between fulcrum and load

d)

Fulcrum and load at the same point

50.

Identify the arrangement that defines a second-class lever.

a)

Effort between fulcrum and load

b)

Fulcrum between effort and load

c)

Load between fulcrum and effort

d)

Fulcrum and effort at the same point

51.

Identify the arrangement that defines a third-class lever.

a)

Fulcrum between effort and load

b)

Load between fulcrum and effort

c)

Effort between fulcrum and load

d)

Fulcrum and load at the same point

52.

When a roller coaster is at the bottom of a hill it has

a)

high potential energy

b)

high kinetic energy

c)

low kinetic energy

d)

equal amounts of kinetic and potential energy

53.

At what position would a cyclist have the most kinetic energy?

a)

A

b)

B

c)

D

d)

F

54.

I released a balloon that was full of air and it is flying around the room, the balloon has

a)

kinetic energy

b)

potential energy

55.

Which form of energy does the flowing water possess?

a)

Gravitational energy

b)

Potential energy

c)

Electrical energy

d)

Kinetic energy

56.

What kind of energy is in a moving skateboard?

a)

Potential

b)

Kinetic

57.

Describe the energy in this picture.

a)

Gravitational Potential

b)

Kinetic

c)

Elastic Potential

d)

No Energy

58.

Select the two examples of kinetic energy.

a)

A rock sitting at the top of a hill.

b)

A car driving down the highway

c)

A dog playing fetch

d)

A stretched rubber band, but not moving.

59.

Which location has the least potential energy but the most kinetic energy.

a)

W

b)

X

c)

Y

d)

Z

60.

A 60-kg skater on the photo is about to move. At this point, what is his kinetic energy?

a)

0 Joule

b)

3,528 Joules

c)

588 Joules

d)

360 Joules

61.

Where is the kinetic energy the greatest?
(enlarge the picture if needed)

a)

1

b)

2

c)

4

62.

According to the above diagram, at what point would the roller coaster car have the greatest kinetic energy?

a)

3

b)

4

c)

5

d)

6

63.

A softball is hit high in the air, as it rises, the softball _____________.

a)

gains kinetic energy and loses potential energy

b)

loses kinetic energy and gains potential energy

c)

loses kinetic energy and loses potential energy

d)

gains kinetic energy and gains potential energy

64.

For the picture of the roller coaster above. Which letter represents the point where the car has the most kinetic energy?

a)

W

b)

X

c)

Y

d)

Z

65.

Using the image, which letter on the coaster represents the greatest kinetic energy?

a)

W

b)

X

c)

Y

100 %

Similar Resources on Wayground

66 questions

8th Grade Science Chemistry STAAR Review

Worksheet

•

8th Grade

60 questions

Mid Term Exam

Worksheet

•

8th Grade

63 questions

𝘾𝙝 3 𝘼𝙨𝙨𝙚𝙨𝙨𝙢𝙚𝙣𝙩 𝙌𝙪𝙞𝙯

Worksheet

•

7th Grade - University

60 questions

Cells Assessment

Worksheet

•

6th - 8th Grade

70 questions

UNIT 1 & 2 Review

Worksheet

•

8th Grade