1. FORCE

2. How does FORCE work?
Soccer player hitting the ball to move it Muscle force
Raising a hot air baloon in the air
Air lifting force

3. How does FORCE work?
Skiers slipping down a mountain : Gravity force
collecting of pouring needles by Magnet :
Magnetic force

4. Definition of Force
Force: a force is any interaction that, when unopposed, will change the motion of an object.  In other words, a force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate.
A force has both magnitude and direction

5. Force Effects
Objects into the motion
Changes the velocity of objects

6. Force Effects
Cause a mass to stop
Cause a mass to change its shape

7. Force Effects
Rotational motions

8. Force Notation The force provides vector properties :
Vectors are quantities that are fully described by both a magnitude and a direction.
1. Application point
2.Direction
3.Way
4.Magnitude O
F = 4N
Exp:
west
east
Magnitude:4N
Application point: O
Direction: west to east
Way: East

9. Examples
8N, Weight (Gravity Force)
3N, north

10. Resultant Force
R = F1 +F2 +F

11. How to find Resultant force?
Parallel edge
End to end :

12. Learn by doing - 1 B A
1. Option
2. Option
R- Force
R - Force

13. Learn by doing A B A 
1. Option
2. Option
R- Force
R- Force

14. ÖNEMLİ:
The forces of the same directional forces are arithmetically summed.
The forces of the opposite directional forces are arithmetically substracted.
If the angle between the two forces is 0, the magnitude of the resultant force is maximum.
If the angle between the two forces is 180, then the magnitude of the resultant force is the minimum.

15. Exercises
3. In a rope-pulling game, the children in group 1 are pulling rope with 10 N and 12 N forces, while the second group with 16 N and 23 N forces. Which group will win the game. Why?

16. Exercises
6 N
8 N
5 N
7 N
3 N
4- Calculate the composition of the forces acting on the body

17. Frictional Force
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other

18. Movement direction of the dog
Frictional Force
The friction force is always opposite to the motion of a body.
Movement direction of the dog
Direction of friction

19. Frictional Force It tries to prevent the standing objects to move.
Reduce the speed of moving objects.

20. Frictional Force
The frictional force is not dependent on the size of the surface (surface area).
Frictional force; It depends on the surface of the body and the mass of the body.