Introduction

Motion is all are around us. Think about all the motions you have already participated in today. Maybe you stood up from a chair or sat down in a chair? Maybe you picked up a book, glass, or plate? Or maybe you simply walked down a hallway or around your room? All of these are examples of motion.

In order for motion to occur, there must be a force applied to the object in order to cause the object to be set in motion. Likewise, if an object is in motion, a force must be applied to stop the object from continuing in motion. There are forces all around us, which cause the motions we see and participate in daily. In this lesson, we will begin to investigate these forces as they relate to motion.

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Lesson Objectives

Following successful completion of this lesson, students will be able to...

  • Define force, force diagram, and external forces
  • Construct force diagrams to identify external forces acting on a system
  • Demonstrate the motion of an object using force diagrams
  • Construct force diagrams

Enduring Understandings

  • A force is a push or pull upon an object, and motion is the result of unbalanced forces acting on an object.

The above objectives correspond with the Alabama Course of Study: Physical Science standards: 8.

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