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- 1. Multiple Choice
A push or pull is a ___________________.
work
force
pulley
load
- 2. Multiple Choice
___________________ pulls objects toward the center of the Earth.
Gravity
Work
Force
Load
- 3. Multiple Choice
Which of the following is the best definition of friction?
A force which opposes gravity
A force which opposes motion of one body across another
The force acting on a body depending upon its mass
A force which stops a body sliding down a slope
- 4. Multiple Choice
True or False...
There is friction when two objects are NOT in contact.
True
False
- 5. Multiple Choice
Which of the following is NOT an example of where friction is helpful?
A nail file
Teeth on a saw
Pistons moving up and down in a car engine
Tread on shoes
- 6. Multiple Choice
A substance that is used to reduce friction is known as:
a lubricant
a tyre
an engine
a brake
- 7. Multiple Choice
A device which enables us to do work more easily is a:
force.
machine.
complex.
thought.
- 8. Multiple Choice
A dinosaur has a mouthful of ________.
Wedges
Levers
Inclined planes
Screws
- 9. Multiple Choice
The force you need to move an object is called the:
frictional force.
effort.
load.
resistance.
- 10. Multiple Choice
A ____________ is made of two or more simple machines.
Load
Simple machine
Wedge
Compound machine
- 11. Multiple Choice
A yo-yo is an example of a __________.
Lever
Pulley
Wedge
Wheel & axle
- 12. Multiple Choice
A simple machine used to raise a flag is a __________.
Pulley
Wedge
Gear
Inclined plane
- 13. Multiple Choice
A crowbar is classed as a simple machine because it:
is extremely strong and will not break easily.
may be used to hit and break large rocks more easily than we could.
may be used to shift large rocks with relatively small force.
is easy to include it as part of a more complicated machine
- 14. Multiple Choice
A machine that splits an object apart is a ____________.
Wheel and axle
Wedge
Pulley
Inclined plane
- 15. Multiple Choice
A lever turns back and forth on a ______________.
work
fulcrum
load
pulley
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