Levers
Wheels and Axles
Screw
Pulley
Inclined Plane/Wedge
100
A _______________ is a fixed point.
fulcrum
100
The wheel and axle is sometimes called a "rotating _______."
lever
100
A screw is a variation of what other simple machine?
Inclined plane
100
Write 2 examples of a pulley.
Flag pole, curtains, window blinds, sails on boats, chain hoists, hydraulic lifts, crane, ski lift (gondola), clocks, etc.
100
The word "plane" means __________. The word "inclined" means ___________ or _____________.
flat surface sloped or at an angle
200
In a class-1 lever, if you push down on the lever arm, the effort goes ______________.
up
200
What part of the wheel and axle is the fulcrum?
The center of the circle
200
What is wound tightly around the central cylinder of a screw?
Thread
200
What are the two types of pulleys?
Fixed and moveable
200
Ramps like a wheelchair ramp are examples of inclined planes. What is another example?
Roads cutting across to travel up a steep hill.
300
These are all examples of a __________ lever: door, bottle opener, and nutcracker
class-2
300
True or false: A music box is an example of a wheel and axle.
True
300
Screws are designed to change the __________ of __________.
Direction of effort
300
Two or more connected pulleys make a ______________ pulley.
Compound
300
List 4 examples of wedges.
doorstop, airplane wheel blocks, ends of needles, pins, nails, cutting tools (knives, axes, saws, scissors), bow of a ship, etc
400
These are all examples of a _____________ lever: fishing rod, tweezers, and brooms
class-3
400
Which tool is an example of a wheel and axle?
Wrench
400
True or false: A bottle cap is an example of a screw.
True
400
Draw a picture of a fixed pulley. Be sure to label effort and load.
Show me your pictures!
400
True or false: A woodpecker's beak acts as a wedge.
True because it splits the wood to get to the insect.
500
Draw a diagram of a class-1 lever. Be sure to label: load, effort, lever arm, and fulcrum.
Show me your drawing!
500
Draw a windlass and show how it acts as a wheel and axle.
Show me your drawing!
500
Explain how a lightbulb is considered a screw.
A lightbulb has grooved threads around the base of the bulb (where the metal is). A person turns the lightbulb so that it screws into the lamp.
500
The wheel of a pulley is called a _____________. (Hint: not a spool)
Sheave
500
Explain whether it would be easier to move a load up a steep ramp or a less steep ramp. Draw a picture to match.
Less steep ramp.
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