1 / 55

Chapter 10 Forces

Chapter 10 Forces. Essential Questions. How is a force described? How do balanced and unbalanced forces affect an object’s velocity?. Force and Net Force. Force is a push or a pull on an object. Net force is the total force on an object. Unbalanced Force Balanced Force.

konane
Télécharger la présentation

Chapter 10 Forces

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 10 Forces

  2. Essential Questions • How is a force described? • How do balanced and unbalanced forces affect an object’s velocity?

  3. Force and Net Force • Force is a push or a pull on an object. • Net force is the total force on an object.

  4. Unbalanced ForceBalanced Force The balanced forces are the forces in equal and opposite directions. • Unbalanced Force can cause an object to, stop moving, or change direction.

  5. Forces change motion.

  6. HMM…. Can you see the unbalanced force here?

  7. Essential Questions • What is Newton’s first law of motion? • What is Newton’s second law of motion?

  8. Newton’s First Law Inertia Greater mass means Greater inertia • An object at rest will stay at rest unless acted upon by an outside force. • Inertia is every objects resistance to change its motion.

  9. Take out a piece of paper and label it “Inertia Mini Lab”

  10. Newton’s Second Law • The acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to the object’s mass.

  11. Force=mass x acceleration F=m x a Or a = Force/ mass a = F/m

  12. Equation for Newton It’s the same as the force equation! Newton=m x a.

  13. Force and mass determine acceleration.

  14. Luke! Use the mass times the acceleration!

  15. Friction

  16. Essential Questions • What factors determine the strength of the friction force between two surfaces? • What factors affect the gravitational force between two objects? • Why do objects accelerate during free fall? • When is matter considered to be elastic?

  17. 3 Types of Friction • The 3 types of friction are: • Sliding friction (strongest) • Rolling friction • Fluid friction (weakest).

  18. What type of friction?

  19. What type of friction?

  20. What type of friction?

  21. 2 Factors of Friction • 1-Type of surface. • 2-How hard the two surfaces push together.

  22. Which type of hockey has more friction?

  23. Gravity

  24. Air Resistance and Weight • Air resistance is a type of fluid friction on falling objects. Weight is the force of gravity on an object at the surface of the Earth.

  25. Law of Universal Gravitation • Gravity acts between all objects in the universe.

  26. Gravity Between Objects • The force of gravity between objects increases with greater mass and decreases with greater distance.

  27. Gravity

  28. Gravity is the force that pulls objects toward the Earth- acceleration due to gravity is 9.8m/s/s.

  29. Pgs. 56-61 Newton’s Third law • If an object exerts a force on another object, the second object, exerts an equal force in the opposite direction.

  30. Essential Questions • What is Newton’s third law of motion? • How can you calculate the momentum of an object? • What is the law of conservation of momentum?

  31. Momentum • The momentum of an object is the product of its mass and velocity. • In other words: Momentum = mass x velocity Kg x m/s

  32. COLLISIONS

  33. Law of Conservation of Momentum • The total momentum of the objects that interact does not change.

More Related