_FORCES and KINDS OF FORCES for GRADE 6.pptx

Forces and Kinds of forces for grade 6 pupils.

1. WHAT IS FORCE? Look at the pictures below. How’s force applied in each picture?

2. WHAT IS FORCE? FORCE- is any kind of push or pull acting upon an object as a result of its interaction with another object -helps us in our daily activities -exerted on one object by another -force is not visible, but we can sense it because we see its effect on objects Whenever there is an interaction between 2 objects, there is a force upon each each of the objects. When the interaction ceases(stops), the 2 objects no longer experience the force. Force only exist as a result of an interaction.

3. ALL ABOUT FORCE * FORCE is measured in Newton ( N)-a unit named in honor of Sir Isaac Newton who discovered gravity and formulated principles related to force and motion. According to him, an object will move only if there is a net force acting upon it. *Net Force- is the total amount of all the forces acting on an object -If the object has two unequal forces acting on it, the net force will be unbalanced

4. SOME EXAMPLES WHEREIN FORCES ARE APPLIED PROPERLY Playing sports that require hitting balls in a controlled manner, such as soccer, volleyball, basketball, or baseball Pulling objects to prevent them from falling or sinking Pushing objects to transport them from one place to another

5. KINDS OF FORCES CONTACT FORCES- these are forces that result from physical interaction Ex. frictional force, tension force, and muscular force

6. EXAMPLES OF CONTACT FORCES TENSION FORCE- it is the force exerted by a rope, cable, chain

7. KINDS OF FORCES https://www.youtube.com/watch?v=t2RjGcvNSas

8. EXAMPLES OF CONTACT FORCES FRICTION- is the force that acts opposite the direction of motion -prevents us from slipping

9. EXAMPLES OF CONTACT FORCES MUSCULAR FORCE - is the force exerted by using body parts such as the arms or legs. It is a force produced by muscle action and is a contact force because there is contact between the surfaces. Every movement of the body necessitates the use of muscular force.

10. KINDS OF FORCES 2. NON CONTACT FORCES/DISTANCE FORCES- these are forces that act within a certain distance Ex. magnetic force, gravitational force

11. EXAMPLES OF NON CONTACT FORCES MAGNETIC FORCE- is produced between two electrically charged moving particles -found between two magnets or between a magnet and a magnetic material

12. EXAMPLES OF NON CONTACT FORCES GRAVITATIONAL FORCE- is the force of attraction that keeps bodies in the universe together -Examples- earth is being attracted to the sun-since the sun has a greater mass-earth is attracted to it and revolves around it

13. FORCES CAN BE CLASSIFIED INTO: BALANCED FORCES- are two equal forces acting on an object in opposite directions -when forces are balance, the object either stays at rest or continues to move at the same speed and at the same direction -balanced forces are present in hanging, floating, standing, or sitting objects

14. BALANCED FORCES

15. FORCES CAN BE CLASSIFIED INTO: 2. UN BALANCED FORCES- are two unequal forces acting on an object -make the object speed up, slow down, change direction, remain in place, or change in shape

16. FORCES CAN BE CLASSIFIED INTO: UNBALANCED FORCES- are two unequal forces acting on an object

17. LET’S WATCH THESE VIDEOS! https://www.youtube.com/watch?v=SybIX2nEn1E https://www.youtube.com/watch?v=eTuiLNYz7JM https://www.youtube.com/watch?v=nk35aGqJ-F8 https://www.youtube.com/watch?v=kUVZIRz7PKs