Force (1).pptxForce (1).pptxForce (1).pptxForce (1).pptx

Force (1).pptx

1. WHAT IS FORCE? APA ITU GAYA?

2. Define force. Describe what force can do to objects. OBJECTIVES LEARNING Describe the three of Newton’s Law 1 2 3

3. Force is a draw or pushes that changes of shape or motion Gaya adalah suatu tarikan atau dorongan yang menyebabkan perubahan bentuk atau gerak FORCE (GAYA)

4. The instrument of gauge force is spring balance Alat pengukur gaya adalah neraca pegas Force unit in International System (SI) is Newton Satuan gaya dalam Sistem Internasional adalah Newton (N)

5. Contact forces result from two objects touching each other. dribbling a basketball kicking a soccer ball hitting a shuttlecock

6. Non-contact forces act on an object without coming into contact with another object. gravitational force magnetic force electrostatic force

7. GAYA SENTUH GAYA TAK SENTUH gaya yang bekerja pada benda dimana terjadi sentuhan langsung pada bendanya gaya yang bekerja pada benda dimana tidak terjadi sentuhan langsung pada bendanya

8. Force Resultant (Force Summation) Two Forces that are in a Line and in the Same Direction Two Forces that are in a Line and in the Opposite Direction

9. Resultan gaya adalah penjumlahan gaya-gaya yang bekerja pada sebuah benda Dua Gaya yang Segaris dan Searah Dua Gaya yang Segaris dan Berlawanan

10. Two forces in the same direction with 100 N and 85 N respectively, work within a material. How much is the combination working of borh forces? Two forces work 200 N to the right and 150 N to the left. Calculate total of the two forces.

11. Calculate Force Resultant

12. ISAAC NEWTON? WHO WAS A renowned physicist and mathematician from England who discovered in 1687 the correlation between force and motion. Today, his three laws of motion are instrumental in describing the movement of any object in the universe.

13. (HUKUM I NEWTON) NEWTON'S FIRST LAW “Every object always in motionless state or moving in straight pattern as long as no forces changing it” “Setiap benda selalu dalam keadaan diam atau bergerak lurus beraturan selama tidak ada gaya luar yang mengubahnya”

14. CONTOH HUKUM I NEWTON EXAMPLE NEWTON'S FIRST LAW You can fell Newton’s first law when you are riding public vehicle. The driver presses brake abruptly when vehicle run. You will be pressed to front. This is because you maintain your state. Kalian dapat merasakan hukum I Newton saat naik kendaraan umum. Pada saat kendaraan melaju dengan tenang, tiba-tiba pengemudi menginjak rem. Kalian akan merasakan terdorong maju. Hal ini disebabkan kalian sebenarnya ingin mempertahankan keadaan kalian.

15. (HUKUM II NEWTON) NEWTON'S SECOND LAW “The acceleration of an object's motion is directly proportional to the resultant force acting on an object and inversely proportional to the mass of the object” “Percepatan gerak benda berbanding lurus dengan resultan gaya yang bekerja pada suatu benda dan berbanding terbalik dengan massa benda”

16. A car toy having 1.5 kg of mass is attracted with 4.5 N of force so it moves. If it friction between wheel and floor is disregarded, how much acceleration of the toy? An object with a mass of 2 kg is acted upon by two forces, each of magnitude 75 N to the right and 45 N to the left. What is the acceleration of the object?

17. (HUKUM III NEWTON) NEWTON'S THIRD LAW “If the first object exerts a force on the second object, then the second object will also exert a force on the first object that is the same magnitude, but in the opposite direction“ “Jika benda pertama mengerjakan gaya terhadap benda kedua, maka benda kedua juga akan mengerjakan gaya terhadap benda pertama yang besarnya sama, tetapi arahnya berlawanan”

18. When swimming, the hands and feet paddle backwards so that the body can move forward Ketika berenang tangan dan kaki mengayuh ke belakang sehingga badan dapat bergerak ke depan EXAMPLE NEWTON'S THIRD LAW

19. When the boat is rowed backwards the boat moves forward and vice versa. Ketika perahu didayung ke belakang perahu bergerak ke depan dan sebaliknya EXAMPLE NEWTON'S THIRD LAW

20. Rockets can be pushed upwards due to the fire gas released from the rocket body Roket bisa terdorong terbang ke atas dikarenakan gas api yang dikeluarkan dari tubuh roket EXAMPLE NEWTON'S THIRD LAW