Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
25 Cards in this Set
- Front
- Back
CLASS 1 LEVER
|
The fulcrum is in the middle of the lever arm.
_____________________ |
|
CLASS 2 LEVER
|
The load is in the middle of the lever arm.
_____________________ |
|
CLASS 3 LEVER
|
The effort is in the middle of the lever arm.
_____________________ |
|
MEMORY TRICK FOR THE
3 TYPES OF LEVERS |
F L E
1 2 3 |
|
THE FOUR PARTS OF A
LEVER SYSTEM |
lever arm
fulcrum load effort |
|
THE RELATIONSHIP BETWEEN THE AMOUNT OF EFFORT NEEDED AND THE EFFORT'S DISTANCE FROM THE FULCRUM:
|
As the distance between the effort
and the fulcrum increases, the effort needed to lift the load decreases. |
|
SINGLE FIXED PULLEY
|
Does not reduce the effort, but gives directional advantage.
|
|
IN A PULLEY SYSTEM, THE EFFORT NEEDED FOR MECHANICAL ADVANTAGE IS
DEFINED AS: |
LOAD ---- NUMBER OF "ROPES" =
EFFORT EX.: 2.4 N --- 2 (ROPES) = 1.2 N |
|
SIX SIMPLE MACHINES
|
1. inclined plane ................. 4. pulley
2. lever .............................. 5. wedge 3. wheel and axle ................ 6. screw |
|
2 BASIC TYPES OF PULLEYS
|
fixed
movable |
|
MECHANICAL ADVANTAGE
|
MAKES WORK EASIER!!
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|