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- 1. Multiple-choice30 seconds1 pt
A book falls off a desk. What moves the book towards the floor?
mass
gravity
friction
speed
- 2. Multiple-choice30 seconds1 pt
Which best explains why a bicycle slows down when it brakes are applied?
The brakes heat the rubber on the bicycle tires
the brakes add energy to the bicycle
the brakes cause frictional forces on the wheels of the bicycle
the brakes increase the force of gravity on the bicycle
- 3. Multiple-choice30 seconds1 pt
A soccer ball is kicked and rolls along a flat field of grass until it comes to a stop. What is MOST responsible for the ball coming to a stop?
air
gravity
mass
friction
- 4. Multiple-choice30 seconds1 pt
A child rides a sled down the snowy hill. Which force is MOST responsible for causing the sled to slow down and stop?
gravity
friction
magnetism
motion
- 5. Multiple-choice30 seconds1 pt
Movers slide a box down a ramp of a truck. What helps slow down the box as it slides to the bottom of the ramp?
friction
inertia
gravity
magnetism
- 6. Multiple-choice30 seconds1 pt
A wagon is pushed in a straight line. How would an increase in friction on the wagon wheels affect the wagon?
It would cause the wagon to move faster.
It would cause the wagon to change mass.
It would cause the wagon to change direction.
It would cause the wagon to slow down
- 7. Multiple-choice30 seconds1 pt
Which of the following is an example of friction that is helpful?
car tires on the road
bike brakes
tread on the bottom of your shoes
all examples are helpful
- 8. Multiple-choice30 seconds5 pts
When an object moves from one place to another, we call it...
friction
motion
gravity
force
- 9. Multiple-choice30 seconds5 pts
a cup sitting on the table has what type of force?
unbalanced force
gravity only
friction
balanced force
- 10. Multiple-choice30 seconds5 pts
A water bottle tipping over on your desk has what type of force?
balanced force
unbalanced force
friction
magnetism
- 11. Multiple-choice30 seconds5 pts
magnets move because of what type of force?
friction
gravity
motion
magnetism
- 12. Multiple-choice30 seconds5 pts
What law of physics says anything in motion stays in motion unless a force acts upon it.
friction
gravity
inertia
motion
- 13. Multiple-choice30 seconds5 pts
A ball sitting at the top of a hill has what type of energy?
potential energy
kinetic energy
sun energy
force
- 14. Multiple-choice30 seconds5 pts
a ball rolling down a hill has what type of energy?
potential energy
sun energy
kinetic energy
force energy
