Definitions
Simple & Compound Machines
Gears
Pulleys
Forces
100
What is the definition of "Rotational" or "Rotary?"
Circular
100
What simple machine is this?
Wheel and axle
100
Where are the gears in this picture?
-
100
What part of this is the pulley?
The rope and wheel in the middle
100
Which of these is an example of a force?
The wind is a force. It is a push force.
200
What is the definition of a "Complex Machine?"
Complex machines (or compound machines) are made up of two or more simple machines.
200
What simple machine is this?
Wedge
200
What is a gear? Describe in your own words
A gear is a special kind of wheel where a toothed wheel turns another toothed wheel.
200
What is a pulley? Describe it in your own words.
A pulley is a system that uses a rope and wheel. The wheel has a grooved track for the rope to run through
200
What is a force? What's an example of a force?
A force is a push or pull. It makes an object change it's speed, direction, or shape.
300
What is "Torque"?
A measure of rotational force
300
Name all 6 of the simple machines.
Lever, inclined plane, wheel and axle, wedge, screw, pulley
300
Name 3 examples of objects that contain gears?
Answers may vary
300
Name 3 examples of objects that contain pulleys.
Answers may vary
300
What is rotary motion and linear motion?
Rotary is in a circle around a fixed point. Linear is in a straight line.
400
What is the definition of a "Machine?"
A machine is something that is created to do a physical task, such as building, moving, or lifting.
A machine is something that does work!
400
What simple machines does the complex machine of a bicycle have in it?
Tires - wheel and axle
Lever - handle bars
Inclined plane in metal design
Screws throughout bike
400
If the first gear was turning to the right (clockwise), what direction would the second gear turn?
Left (counterclockwise)
400
How does a pulley help humans?
It makes it much easier to lift a load.
400
What does it mean to "Transform Motion?"
When something can change from rotary to linear or vice-versa.
500
What is the definition of a "Mechanism?"
A mechanism is a system in a machine that can modify a motion.
Ex - GEARS
500
What simple machines are in this complex machine?
Tires - wheel and axle
Plow - wedge
Lever - connecting the plow to the truck
Screws throughout the truck
500
What is the relationship between speed and force in gears?
If the first gear has more teeth, the second gear will turn faster because it has to "keep up."
If the first gear has less teeth, the second gear will move with more force.
500
What are the three types of pulleys?
Fixed - doesn't move
Moveable - you can move the pulley
Compound - has one of each; two pulleys involved
500
What is an input force? What is an output force?
The place where the force starts is known as the input. The thing that is moved by the gear is called the output.