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;
13 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
Define Simple Machines |
A machine is a device that helps people for work more easily. It does at least one function... |
There are several kinds |
|
|
What are the 6 Simple Machines? |
Inclined Slope, Wedge, Screw, Lever, Wheel-and-Axis, and Pulley. |
|
|
|
Function of Inclined Plane and an example. |
Multiply Force. Ex) Ramp |
|
|
|
Function of Wedge and an example. |
Multiply Force. Knife |
Long, thin wedges multiply Force more than short, thick wedges. |
|
|
Function of Screw and an example. |
Multiply Force. Ex) Cork Screw |
Hand operated |
|
|
Function of Lever and an example. |
Multiply Force, Speed and Distance. Ex) Pliers Is divided into 3 classes depending on lead, effort, and fulcrum arrangement. |
|
|
|
Function of Wheel-and-Axis and an example. |
Multiply Force, Speed, Distance. Ex) Screwdriver |
|
|
|
Function of Pulley and an example. |
Change force direction. Multiply Force. Ex) Four-Pulley System |
|
|
|
Define Mechanical Advantage. |
The amount by which a machine can multiply a force. |
|
|
|
Formula for Mechanical Advantage? |
Mechanical Advantage = Load Force/Effort Force MA = LF/EF |
|
|
|
What is Effort and Load force primarily measured in? |
Newtons (N) |
|
|
|
Define Load Force and Effort Force. |
Load: Force needed to move an object without the machine. Effort: Force needed to move an object with a machine. |
|
|
|
Formula for Efficiency? |
Efficiency = LF x Load Distance/EF x Effort Distance. It's impossible to have 100% Efficiency. |
|
