Chapter Nine, Lesson Two: Understanding Machines Flashcards
1
Q
machines
A
Machines are devices that allow you to do work in an easier way.
2
Q
input force
A
When you do work, the force you exert is called the input force.
3
Q
output force
A
The machine exerts the output force over the output distance.
4
Q
mechanical advantage
A
A machine’s mechanical advantage is the number of times a machine increases a force exerted on it.
5
Q
efficiency
A
The efficiency of a machine compares output work to input work.
