P2.3.5 - Simple Machines Flashcards
1
Q
What is a lever?
A
A force multiplier
2
Q
What is the effort?
A
The force you exert on the lever
3
Q
What is the load?
A
The force the lever exerts on the load
4
Q
What happens if the pivot is close to the load?
A
You only need a small effort to lift it
5
Q
What is mechanical advantage?
A
The ratio of the load to the effort
6
Q
What is the equation for mechanical advantage of a lever?
A
Mechanical advantage of a lever
Load/Effort
7
Q
What are gear?
A
Moment multipliers
8
Q
What is the equation for mechanical advantage of a gear?
A
Mechanical advantage of a cog
Output cog radius / input cog radius
9
Q
What happens with a small input gear and a large output gear?
A
Turns slower
Moment increases
10
Q
What happens with a small output gear and a large input gear?
A
Turns quicker
Moment decreases
