1. Simple Machines

2. Work
the transfer of energy to an object by using a force that causes the object to move in the direction of the force W = F x d

3. Think-Pair-Share
Select the activities below that require the least amount of work -carrying heavy books home -reading a 300-page novel -skiing for 1 hour -lifting a 45 kg mass -holding a steel beam in place for 3 h -jacking up a car

4. Joule (J)
unit used to measure energy Example: W = F x d W = 80 N x 1 m 80 (N x m) 80 J

5. Power
the rate at which work is done or energy is transformed P = Work divided by time P = W ÷ t Measured in watts (W): the unit used to express power (equal to J/s)

6. What is a machine?
A machine is a device that makes work easier by changing the size or direction of a force.

7. Simple Machines Foldable
Using a foldable, you are going to:
Identify the six different types of simple machines
Define each type of simple machine
Give two real-world examples of each types of simple machine

8. 1. Inclined Plane
ramp or slanting surface that connects a lower level to a higher level

9. 2. Lever
stiff bar that rest on a support called a fulcrum

10. 3. Pulley
grooved wheel with a rope or cable around it

11. 4. Screw
an inclined plane wrapped around a pole

12. 5. Wedge
slanting side ending in a sharp point used to split, lift, or hold

13. 6. Wheel and Axle
circular device with a rod, called an axle, through its center

14. Complex Machines
Two or more simple machines that work together to do work