1. Key Question: What is a simple machine?
Simple Machines
Key Question:
What is a simple machine?

2. What is a machine?
-A device that uses a mechanical system to accomplish a task
What is a Mechanical System?
A series of interrelated, moving parts that work together to accomplish a simple task

3. What is the difference between a simple machine and a complex machine?
Simple machine – a machine with few or no moving parts. Simple machines make work easier.
Compound machine- two or more simple machines used together to accomplish a task.
Complex machine – combination of one or more simple machines and a power source.
What is an example of a power source?

4. Examples of

5. Why are machines useful?
Because they provide a mechanical advantage.
Mechanical advantage is the ratio of the output force to the input force.
What does this mean?
MA=Fo/Fi

6. Mechanical Advantage
Having a mechanical advantage decreases the effort but increases the distance. The amount of work stays the same, its just easier.

7. What would we call a person who designs machine’s for a living?
An engineer uses scientific knowledge to create or improve inventions that solve problems

8. Engineering Cycle
1.Evaluate
2.Design
3.Prototype
4.Test