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50 questions
A boy uses this simple machine to lift a load. How does this machine help the boy to do work?
by changing the direction
by reducing total work
by decreasing distance
by reducing effort force
An ax head is a simple machine called a wedge. How can you make the cutting edge more efficient?
make it longer
make it shorter
make sharper
make it more rounded
Which ramp will require the least amount of force?
A
B
C
D
In order to exert the least amount of force, where should the fulcrum be placed?
position D
position C
position B
position A
A catapult is an example of a _________ .
lever
wheel and axle
screw
inclined plane
Which of the following is not a lever?
A bunch of levers pivoting around a fulcrum =
wheel
screw
wedge
pulley
Gears are wheels with teeth.
True
False
Stairways are a combination of a ______ and a ladder.
screw
ramp
pulley
wheel
Which of the following is NOT an example of a screw?
A prosthetic arm is an example of a _________.
ramp
screw
pulley
lever
A crane uses ___________ to lift heavy loads.
ramps
pulleys
axles
wedges
What type of lever
First Class Lever
Second Class Lever
Third Class Lever
What class lever is a soda tab?
1st
2nd
3rd
What class lever is a hammer?
1st
2nd
3rd
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