1. Make a list of what you know about Simple Machines?
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Make a list of what you know about Simple Machines?

2. Simple Machines and Work
SPS8. Students will determine relationships among force, mass, and motion. e. Calculate amounts of work and mechanical advantage using simple machines.

3. Simple Machines
An unpowered mechanical device that reduces the amount of effort we have to put into the machine to move something.
Make work easier by
Redirecting a force
Multiplying a force
Both redirecting and multiplying a force

4. Simple Machines Examples Pulley Lever Inclined plane Wheel and axle
Wedge
Screw
Screw

5. Mechanical Advantage
The amount a machine multiplies our effort put into a machine.
Formula
MA = Fr = de
Fe dr
MA = Forceresistance
Forceeffort
MA = distanceeffort
distanceresistance

6. Mechanical Advantage

7. Effort
the force you apply to the simple machine or the distance you apply the force on the simple machine

8. Effort

9. Resistance
the weight the machine moves for you or the distance the machine moves an object for you

10. Resistance

11. Work
A force is applied to an object and the object moves in the direction of the force.
W = F x d

12. Work Which of the following is work?
You pick up a 10 N book and lift it 1 m.
You hold the book and walk with it for a distance of 10 m.

13. Summary
What does a simple machine do for you?