LAW OF INERTIA.pptx first law of motion by Isaac Newton (First Quarter Grade 8 Science)

first law of motion

1. First Law of Motion The Law of Inertia

2. Objectives 1. Recognize the relationship of the amount of force applied and the mass of the object to the amount of change in the object’s motion. 2. Realize how body respond to changes in motion. 3. Demonstrate Newton’s first law of Motion

3. 2 PARTS 1. An object at rest will remain at rest unless acted upon by an unbalanced force. - EXAMPLE : If you place your Math book upon your desk at the end of the school day, it will still be in the same place when you return in the morning

4. 2. An object in motion will stay in motion until something stops it. EXAMPLE : A ball in a game of catch, when someone throws a ball to you, that will stays in motion, until it meet your mitt and suddenly stop

5. Remember : A more massive object,like a boulder, has a greater tendency to resist changes In its state of motion than your Math book did.

6. What kind of things stop a moving object? 1. People 2. Another object 3. Friction – a force and it is the resistance that one surface or object encounter when moving against the other.

7. Friction

8. Why is it that when you kick a soccerball on the field, it stop? This is because the grass or the uneven ground under the ball, creates a friction .

9. What do you think would happen if we sloped the surface the soccer ball was rolling on ? The ball on a sloped surface is still affected by friction.

10. 4. Gravity – is stronger on the sloped surface, so the ball will continue to move downhill, despite the friction because gravity is pulling it downward.

11. 5. Acceleration – is a change in speed or direction.

12. 6. Air Resistance – a kind of friction ( a force that opposes motion) which occurs between air and another object.

13. Remember : 1. The STACK OF COIN activity is about the property of an object to resist any change in its state of motion what we call as Inertia. 2. The coin dropped into the glass because it was trying to remain in a state of rest. Law of Inertia : A body at rest or move at constant velocity unless acted upon by an external or unbalanced force

14. Identify whether law of inertia applied or not applied. 1. Landing of an aircraft 2. Stirring of coffee 3. The sudden application of brakes in a vehicle 4. Men in space 5.Satellite in space 6. A curling stone 7. A rolling ball 8. When you stop pedaling a bicycle 9. A rotating door 10. Hammer throw 11. When you try to get down from a moving vehicle

15. Identify whether law of inertia applied or not applied. 12. Anything you throw inside a vehicle will come down to you 13. In marathon or short sprints, the athlete continues running even after finishing 14. Running before the long jump to get an advantage 15. Car with the engine off still moves due to inertia of motion

16. Research at least 5 examples of Law of Inertia in everyday activities.