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PICK UP JOURNAL FROM COUNTER BY DOOR AND FILL OUT TABLE OF CONTENTS Table of Contents DateEntryPag e # 9/1 0 Observations Quiz 7 Unit 2: Force and Motion.

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Presentation on theme: "PICK UP JOURNAL FROM COUNTER BY DOOR AND FILL OUT TABLE OF CONTENTS Table of Contents DateEntryPag e # 9/1 0 Observations Quiz 7 Unit 2: Force and Motion."— Presentation transcript:

1 PICK UP JOURNAL FROM COUNTER BY DOOR AND FILL OUT TABLE OF CONTENTS Table of Contents DateEntryPag e # 9/1 0 Observations Quiz 7 Unit 2: Force and Motion 9/1 0 Force Notes8

2 FORCE Objective: Students will demonstrate and illustrate forces that affect motion in everyday life

3 FORCE VIDEO

4 FORCES A force is a push or pull Forces give energy to objects Forces cause a change in motion (start moving, speed up, change direction, slow down, or stop)

5 FORCE FORCE – is measured in units called NEWTONS (N) Examples- a force will have the letter N behind it. 12N and 135N represent forces. FORCE is measured using a spring scale. A spring scale measures the amount of force needed to move an object. 5

6 To describe a force, you must know two things: Size of the force and Direction of the force

7 VERY IMPORTANT INFORMATION ABOUT FORCE!!! To describe a force, you must know two things: Size or strength of the force and the Direction of the force 25N Direction of Force Size or Strength of force

8 BALANCED FORCES Forces that are equal in size but opposite in direction are under balanced forces Balanced forces do not cause a change in the motion of objects

9

10 UNBALANCED FORCES Unbalanced Forces can cause an object to change directions or to start moving

11 UNBALANCED FORCES Unbalanced forces can change the motion of an object in two ways:  When unbalanced forces act on an object at rest, the object will move  When unbalanced forces act on a moving object, the object will change direction

12 PRACTICE PROBLEMS PLEASE COPY THE PROBLEM!!!! CALCULATING NET FORCE

13 PROBLEM A Net Force Unbalanced 225 N

14 PROBLEM B Net Force Unbalanced 75 N

15 PROBLEM C Net Force Balanced 50 N 0 N 50 N 100 N

16 PROBLEM D Net Force Unbalanced 792 N 224 N 632 N 400 N 100 N900 N + + +

17 PROBLEM E Net Force Unbalanced 550 N 13 N 750 N 1563 N 250 N + +

18 PROBLEM F Net Force Unbalanced 987,256 N 6011 N 993,267 N

19 THANK YOU! Glue your notes on page 8 Please pass down your journals!


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