Definitions
What do you call a push or pull acting on an object
Force
An axe is an example of what type of simple machine?
True or False
Machines allow us to do less work
False - they do the same amount of work but they make it easier
RPMs
The three parts of a lever
Fulcrum, load, effort
Linkage
What is torque?
the output force applied by the gears to the machine
Trial and error
Changing a design or parts of a design to help you improve the function
A doorknob is what type of simple machine?
Wheel and axle
Transmissions transfer force from the ______ to the ______
Engine --> wheels
Speed
Subsystem
A small set of parts that have one specific function
Using an inclined plane reduces the force needed but increases the _________
Distance
What you apply to a machine for it to do work is called ______ ______
Input force
If a driver gear has 10 teeth and the driven has 5, what is the gear ratio?
1:2
Machine
a device that makes work easier by changing force or motion
Turns rotational force into linear force
Screw
What was one of the three systems used to move water in the past?
1. Archimedes Screw
2. Aqueducts
3. Persian Wheel
A gear ratio of 3:1 would have _____ speed and ____ torque.
It is reducing = low speed, high torque