1. Energy
&
Simple Machines

2. What is WORK? What is FORCE?
Occurs when a FORCE causes an object to move
What is FORCE?
A PUSH or a PULL on an object

3. What is a Simple Machine? A tool that helps make work easier
A machine makes work easier by changing the
size or direction (or both) of a force
The FORCE and OBJECT have to go the SAME direction
WORK
WORK

4. Have you ever used a ramp to load a heavy object into a pick-up truck?
Machines do NOT save work. They just make work EASIER
The SAME amount of work is still done
Have you ever used a ramp to load a heavy object into a pick-up truck?

5. Types Of Simple Machines
All machines are made from these 6 simple tools:
1. Lever
2. Inclined plane
3. Wedge
4. Screw
5. Wheel and axle
6. Pulley

6. Pulleys 3 types of pulleys:
A simple machine consisting of a wheel that holds a rope
changes the direction and/or amount of force needed to lift an object
3 types of pulleys:
1. Fixed Pulley
2. Movable Pulley
3. Block and Tackle

7. Pulleys

8. What is a Pulley?
A pulley consists of a rope wrapped around a grooved wheel.
The rope of chain is wrapped around the wheel, and one end is attached to the load.
The other end is pulled to move the load.

9. Why Use a Pulley Pulley Systems
A pulley can change either the size or the direction of a force.
Pulley Systems
More than one pulley can be used in a pulley system to reduce the force needed even more.
The more pulleys in a system, the greater
the distance you will have to
pull the rope.

11. What is an INCLINED PLANE?
A simple machine that is a straight, slanted surface
The longer the inclined plane is compared to its height, the easier it is to make to the top

12. Inclined Plane
An inclined plane is a simple machine with a flat slanted surface.

13. Inclined Plane
Inclined planes reduce the force needed and to make work easier.
The longer the plane the greater the distance and the less force needed.

14. Some examples of an inclined plane are

15. Simple Machines Reflection
Pulley
Inclined Planes
Definition
Draw at least 3 real world examples of a pulley
Write 1 sentence for each picture explaining how it makes work easier
Draw at least 3 real world examples of inclined planes