1 / 11

March 20, 2014- Happy Spring!

March 20, 2014- Happy Spring!. Homework : Complete Will, Bill, and Phil worksheet- Read over Fig. 3 on page. 39 in textbook Do Now: - Write down homework, put worksheet in notebook- glue in later

nona
Télécharger la présentation

March 20, 2014- Happy Spring!

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. March 20, 2014- Happy Spring! • Homework: Complete Will, Bill, and Phil worksheet- Read over Fig. 3 on page. 39 in textbook • Do Now: -Write down homework, put worksheet in notebook- glue in later • Update T.O.C: pg: 1: The nature of Force, pg 2: Combining Forces: Net Force/ Unbalanced Forces • Open Textbook to pg. 36- Open NB. To pg 89/1

  2. Chapter 2- Forces The Big Idea: Motion and Forces Essential Question (EQ): What causes an objects motion to change?

  3. The nature of force • Where does it all begin? • What causes an object to start moving, stop moving or change direction? Force -Is a push or a pull- exerted by one object onto a second object. -Forceis described by its strength and direction and these are symbolized with an arrow

  4. The strength and direction a can be represented with an arrow • Points in the direction of the force • The length of the arrow shows its strength. **The longer the arrow the greater the force**

  5. The Newton (N) • The strength of a force is measured in the SI unit called a newton (N) • One newton of force = lifting up a small lemon

  6. Net Force/ (un)Balanced Forces • Net Force – the combination of all the forces acting on an object-Determines if the object moves and which direction it moves in- It always acts in the direction of the greatest force. • Unbalanced force:-} Can cause an object to start moving, stop moving or change direction- results in a net force and causes a change in motion • Balanced Forces:-} Equal forces acting on one object in opposite directions- there is no change in motion and no net force

  7. Tug-of-war? If the net force is anything other than zero (0)- forces are unbalanced and there is a change in motion

  8. Combining forces( pg. 2 in Notebook) • Look at Fig. 2 on pg. 37: • When the two arrows are going in the same direction they are added together to find the net force • Two forces act in opposite directions- they are subtracted (or like adding a positive # to a Negative #) • *The net force ALWAYS acts in the direction of the greatest force.* • A net force of zero (0) --the forces are balanced- no change in motion

  9. Is the force Balanced or unbalanced? Unbalanced- What is the net force and in which direction is it going in?

More Related