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Simple Machines

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 1. 

Two people are working out in a gym. Mr. H lifts 300 pounds and moves it 12 inches. Ms G lifts 150 pounds and moves it 2 feet. Who did more work?
a.
Ms G.
b.
They both did the same amount of work.
c.
Neither of them did any work.
d.
Mr. H
 
 
The six types of simple machines are:
• inclined plane
• wedge
• screw
• lever
• pulley
• wheel and axle

Identify the simple machine in each of the following descriptions. Use the pictures on the left side of the screen to help you.
 

 2. 

The cap on a water bottle has a spiral shape.  When you place it on the bottle and twist, the cap pulls itself toward the bottle. The bottle cap is an example of which simple machine?
a.
Screw
b.
Wedge
c.
Pulley
d.
Wheel and Axle
 

 3. 

When used to split wood, the head of an axe is driven through the wood dividing it in two. The head of an axe is an example of
a.
a screw
b.
a lever
c.
a wedge
d.
an inclined plane
 

 4. 

An object’s speed and direction at a given instant is its _______.
a.
acceleration
b.
velocity
c.
speed
d.
motion
 

 5. 

The center of a seesaw is used to balance the board with the seats.  The children can easily move up and down without much force. The seesaw is an example of which simple machine?
a.
The wedge.
b.
This is not a simple machine.
c.
The inclined plane.
d.
The lever.
 

 6. 

A ramp is used for loading a truck.  A mover can pull a cart  with a heavy object up the ramp.  This is much easier than lifting heavy objects into the truck. Which simple machine is on the back of this truck?
a.
Screw
b.
Inclined plane
c.
Wheel and Axle
d.
Wedge
 

 7. 

The distance traveled by an object in a given amount of time is _______.
a.
speed
b.
velocity
c.
motion
d.
acceleration
 

 8. 

A wheel with a rope is used to hoist a flag up to the top of a tall flagpole.  This simple machine can also be used to help lift heavy objects with less force. The wheel and rope make up which simple machine?
a.
Wedge
b.
Wheel and Axle
c.
Pulley
d.
Screw
 

 9. 

When you turn the large knob on a door, a rod on the inside releases a latch that holds the door closed. It would be difficult to turn the rod, if the knob wasn't attached to it.  The door knob and rod make up which simple machine?
a.
Inclined Plane
b.
Wedge
c.
Wheel and Axle
d.
Pulley
 

 10. 

Newton’s Second Law of Motion describes the relationship between force(F), mass(m), and acceleration(a). Which of the following equations correctly represents Newton’s Second Law?
a.
m=F x a
b.
F=m x a
c.
none of the above
d.
a = F x m
 

 11. 

The change in an object’s velocity over time is its _______.
a.
velocity
b.
acceleration
c.
speed
d.
motion
 

 12. 

Newton’s First Law of Motion describes an object’s tendency to resist a change in motion. What is another name for this tendency?
a.
mass
b.
inertia
c.
force
d.
unbalanced force
 

True/False
Indicate whether the sentence or statement is true or false.
 

 13. 

Stationary objects do NOT have any forces acting upon them.
 

 14. 

Every force has a certain strength, or magnitude, and direction.
 

 15. 

Mass and weight are the same thing.
 

 16. 

Newton’s Third Law of Motion states “For every action, there is an equal and opposite reaction.”
Based on Newton’s Third Law, T or F, when you sit on a chair, the chair the chair pushes up on you with a force equal to your weight.
 

 17. 

Two people are working out at the gym. The first person, Mr. H, strained with all his might, for as long as he could, but was unable to move the weight he was trying to lift. Meanwhile, the second person, Ms G, picked up a towel and carried it over for him to cry in. In this case Ms G did more work than Mr. H.
 

Completion
Complete each sentence or statement.
 
 
Use the following word list to answer “fill in the blank questions”. The words must be spelled EXACTLY as shown, including the use of a capital letter:

Gravity
Mass
Force
Net force
Weight
Balanced forces
Joules
Unbalanced forces
 

 18. 

___________ is a measure of the amount of “stuff” in an object.
 

 

 19. 

___________ of an object is the combination of all the forces acting upon it.
 

 

 20. 

___________ produce no change in the motion of an object..
 

 

 21. 

___________ is a push or pull on an object.
 

 

 22. 

___________ is a measure of the force of gravity acting on an object.
 

 

 23. 

___________ is the force of attraction between objects that have mass.
 

 

 24. 

___________ produce a change in the motion of an object..
 

 

 25. 

___________ is the measure of work (also known as newton-meters).
 

 



 
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