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- 1. Multiple Choice
A hammer and a screw are examples of ___________________.
momentum
simple machines
potential energy
motion
- 2. Multiple Choice
A change in an object’s position when compared to a fixed object is called ______________________.
momentum
simple machines
potential energy
motion
- 3. Multiple Choice
Using wheels and rollers reduces ____________________.
acceleration
force
friction
kinetic energy
- 4. Multiple Choice
If a car travels 120 kilometers in 2 hours, its ___________________ is 60 km per hour.
speed
kinetic energy
force
friction
- 5. Multiple Choice
A ball rolling down a hill displays mostly _________________.
potential energy
force
friction
kinetic energy
- 6. Multiple Choice
A _________________ is required to set an object in motion or to stop a moving object.
kinetic energy
acceleration
force
friction
- 7. Multiple Choice
The _______________ of a moving object depends on its mass and how fast it is moving.
simple machines
momentum
motion
potential energy
- 8. Multiple Choice
If a moving object changes its direction, then its ___________________ has also changed
acceleration
force
friction
kinetic energy
- 9. Multiple Choice
An elastic band that is stretched possesses mostly _______________.
potential energy
momentum
motion
simple machines
- 10. Multiple Choice
Helicopters and ceiling fans use ___________________.
motion
momentum
simple machines
wheels and axles
- 11. Multiple Choice
Match the word to it's meaning:
action-reaction forces
forces described in Newton’s third law of motion
the measure of a force applied to an object multiplied by the distance an object moves
the unit used for measuring power
a straight, slanted surface that can multiply an effort force
- 12. Multiple Choice
Match the word to it's meaning:
balanced force
a unit used to measure work, or newton-meters
a straight, slanted surface that can multiply an effort force
an inclined plane that changes the direction of an applied force
a push or pull that does not change the motion of an object
- 13. Multiple Choice
Match the word to it's meaning:
inclined plane
a simple machine in which the effort force is between the output force and the fulcrum
a straight, slanted surface that can multiply an effort force
forces described in Newton’s third law of motion
the unit used for measuring power
- 14. Multiple Choice
Match the word to it's meaning:
joule
the unit used for measuring power
the measure of the force of gravity on an object
a unit used to measure work, or newton-meters
a force that opposes motion of two stationary objects
- 15. Multiple Choice
Match the word to it's meaning:
static friction
a force that opposes motion of two stationary objects
forces described in Newton’s third law of motion
the unit used for measuring power
the measure of the force of gravity on an object
- 16. Multiple Choice
Match the word to it's meaning:
third-class lever
a straight, slanted surface that can multiply an effort force
a simple machine in which the effort force is between the output force and the fulcrum
the measure of the force of gravity on an object
forces described in Newton’s third law of motion
- 17. Multiple Choice
Match the word to it's meaning:
watt
the unit used for measuring power
a push or pull that does not change the motion of an object
the measure of the force of gravity on an object
a straight, slanted surface that can multiply an effort force
- 18. Multiple Choice
Match the word to it's meaning:
wedge
forces described in Newton’s third law of motion
an inclined plane that changes the direction of an applied force
a unit used to measure work, or newton-meters
a force that opposes motion of two stationary objects
- 19. Multiple Choice
Match the word to it's meaning:
weight
the unit used for measuring power
a push or pull that does not change the motion of an object
the measure of the force of gravity on an object
a straight, slanted surface that can multiply an effort force
- 20. Multiple Choice
Match the word to it's meaning:
work
the measure of a force applied to an object multiplied by the distance an object moves
forces described in Newton’s third law of motion
an inclined plane that changes the direction of an applied force
a unit used to measure work, or newton-meter
- 21. Multiple Choice
Why is it not a good idea to reduce the friction involved when moving an object up an inclined plane?
Choose 2
Friction counteracts the force of gravity that would otherwise pull the object back down the inclined plane.
Reduced friction would result in a greater work input would be needed to move the object up the inclined plane.
Reduced friction will make it slide easier.
- 22. Multiple Choice
What is the average speed of this object?
The object travels 78 meters in 6 seconds. Therefore, its average speed is 78 m/6 s = 13 m/s.
The object travels 78 meters in 6 seconds. Therefore, its average speed is 78 m x 6 s = 468 m/s.
The object travels 78 meters in 6 seconds. Therefore, its average speed is 6 s/78 m = 0.769 m/s
- 23. Multiple Choice
This object travels 78 meters in 6 seconds. What additional information is needed to know its velocity?
The direction in which the object is moving .
The weight of the object.
The material the object is made of,
- 24. Multiple Choice
What will happen to a book placed in a table that is raised at an angle?
The book will be held in place by static friction until the angle of the table becomes too great. The book will then slide off.
The book will be held in place by potential energy until the angle of the table becomes too great. The book will then slide off.
The book will be held in place by kinetic energy until the angle of the table becomes too great. The book will then stop moving.
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