Forces

Chapter 22 and 23 cover Force and Work.
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Dear Parents and Students,

Our science class will soon begin exploring the chapters entitled “Forces and Work” and "Forces and Fluids". In this chapter, students will learn about work and how simple machines can help make work easier. Also students will learn how pressure is exerted by fluids, why some things sink while others float, and how the shape of an object affects its speed in the water or air. By the end of the chapter, students should demonstrate a clear understanding of the chapter’s main ideas and be able to discuss the following topics:

1.    how fluids exert pressure (Ch 23 Section 1)

2.    the relationship between fluid depth and pressure (Ch 23 Section 1)

3.    examples of fluids flowing from high to low pressure (Ch 23 Section 1)

4.    the relationship between fluid pressure and buoyant force (Ch 23 Section 2)

5.    the likelihood of a particular object floating in a fluid (Ch 23 Section 2)

6.    the role of density in an object’s ability to float (Ch 23 Section 2)

7.    Pascal’s principle and how it is applied (Ch 23 Section 3)

8.    the relationship between pressure and fluid speed (Ch 23 Section 3)

9.    the roles of lift, thrust, and drag in flight (Ch 23 Section 3)

10.    examples of Bernoulli’s principle in real-life situations (Ch 23 Section 3)

Questions to think about...
•    How could I measure the volume of a book? of my arm? Would I use the same method for measuring each one?

•    When will an object float?

•    How does an airplane get off the ground?

•    Why does a curveball curve?


Florida Sunshine State Standards
The following standards are addressed in this chapter:

B.1.3.4 CS    knows that energy conversions are never 100% efficient (i.e., some energy is transformed to heat and is unavailable for further useful work).

B.2.3.1 AA    knows that most events in the universe involve some form of energy transfer and that these changes almost always increase the total disorder of the system and its surroundings, reducing the amount of useful energy.

C.2.3.1 CS    knows that many forces (e.g., gravitational, electrical, and magnetic) act at a distance (i.e., without contact).

C.2.3.2    knows common contact forces.

C.2.3.3    knows that if more than one force acts on an object, then the forces can reinforce or cancel each other, depending on their direction and magnitude.

C.2.3.5    understands that an object in motion will continue at a constant speed and in a straight line until acted upon by a force and that an object at rest will remain at rest until acted upon by a force.

C.2.3.6 AA    explains and shows the ways in which a net force (i.e., the sum of all acting forces) can act on an object.

iMovie Tips (pdf file)
iMovie Tips to help you create your movie

Force iMovie Rubric (pdf file)
Here is a copy of the Force iMovie Rubric that was handed out in class

Force Student Outline (doc file)
Download this outline to your laptop and fill it in with the information about your sport.

Force Notecards (pdf file)
Use this file to help you create your notecards

Force iMovie Directions (pdf file)
Here is a copy of the Force iMovie Directions that were handed out in class

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