2. Types of Forces Force – An interaction between two objects resulting in a push or a pull

3. Example 1 Consider the water bottle below at rest on a table. System Schema – a visual representation of the objects that are interacting and the types of interactions (Forces) that are occurring. Water Bottle Earth Force of Gravtity = A long range force exerted by the Earth on an object

4. Types of Forces Example 1 Consider the water bottle below at rest on a table. Water Bottle Earth Table Floor Normal Force = A support force that always acts perpendicular (Normal) to the surface

5. Types of Forces Example 1 Consider the water bottle below at rest on a table. Water Bottle Earth Table The water bottle has two interactions leading to two forces acting upon it.

6. Example 2 Consider the water bottle below pulled horizontally across the floor at constant velocity. Types of Forces

7. Water Bottle Earth Floor Example 2 Consider the water bottle below pulled horizontally across the floor at constant velocity.

8. Types of Forces Water Bottle Earth Floor Types of friction: Force of Kinetic Friction = force of friction due to surfaces in relative motion Force of Static Friction = force of friction that opposes attempted motion of the surfaces Example 2 Consider the water bottle below pulled horizontally across the floor at constant velocity.

9. Types of Forces Water Bottle Earth Floor Me Example 2 Consider the water bottle below pulled horizontally across the floor at constant velocity. Applied Force = the force which is applied to an object by a person or another object.

10. Types of Forces Water Bottle Earth Floor Example 2 Consider the water bottle below pulled horizontally across the floor at constant velocity. The water bottle has four interactions leading to four forces acting upon it. Me

11. Example 2a What would change about the system schema if the bottle was pulled across the floor at constant velocity by a rope? Types of Forces

12. Force of Tension = force which is transmitted through a string, rope, wire or cable when it is pulled tight by forces acting from each end. Water Bottle Earth Floor Rope Example 2a What would change about the system schema if the bottle was pulled across the floor at constant velocity by a rope?

13. Types of Forces Water Bottle Earth Floor Rope Example 2a What would change about the system schema if the bottle was pulled across the floor at constant velocity by a rope? Me The water bottle has four interactions leading to four forces acting upon it. I interact with the rope, not the water bottle.

14. Types of Forces Water Bottle Earth Floor Rope Example 2a What would change about the system schema if the bottle was pulled across the floor at constant velocity by a rope? The water bottle has four interactions leading to four forces acting upon it.