1 / 23

Newton’s Second Law

Newton’s Second Law. TEKS 8.6A demonstrate and calculate how unbalanced forces change the speed or direction of an object’s motion TEKS 8.6C investigate and describe applications of Newton’s law of force and acceleration. Net Force, Mass and Acceleration.

elainee
Download Presentation

Newton’s Second Law

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. Newton’s Second Law TEKS 8.6A demonstrate and calculate how unbalanced forces change the speed or direction of an object’s motion TEKS 8.6C investigate and describe applications of Newton’s law of force and acceleration

  2. Net Force, Mass and Acceleration

  3. Isaac Newton discovered one of the most important laws of nature; the relationship between net force, mass (inertia) and acceleration.https://www.youtube.com/watch?v=M6iI5T3Yzbo

  4. Newton’s Second Law states that the net force acting on a mass causes the mass to accelerate in the direction of the net force.

  5. A shorthand way of writing this law is: f = ma f = force in newtons (N) m= mass in kilograms (kg) a = acceleration in meters per second per second (m/s2)

  6. Objects with more mass are more difficult to accelerate.

  7. If the same force is applied to two objects with different masses, the one with the smaller mass will accelerate more.

  8. More mass means less acceleration, unless a larger forceis applied.

  9. Same Forces leads to large acceleration small mass leads to small acceleration large mass

  10. Different Forces small force small mass Same Acceleration can lead to large force large mass

  11. Falling Objects and Newton’s 2nd Law

  12. The Italian physicist and astronomer, Galileo Galilei, studied falling objects.

  13. He found that when two objects of different masses are dropped, they fall at the same rate.

  14. This was never fully understood until Isaac Newton announced his Second Law of Motion.

  15. In the case of free falling objects, the force is equal to the weight of the object, which is determined by the acceleration of gravity (9.8 m/s2).

  16. Try dropping a book and a ball of paper. See what happens.

  17. Now try dropping a piece of paper and a book. Most likely you will see that the paper falls more slowly.

  18. Remember the book has more weight than the paper, so it has more force to resist friction from the air.

  19. Try dropping the book with the paper against the lower surface of the book. What happens?

  20. Now try dropping the book with the paper on top of the book. How will the accelerations of the book and the paper compare? Will they separate and fall differently?

  21. m=50kg 2 m/s2 .05 m/s2 m=2000 kg f= f = 100N 100N How much force will be required to move the object in each picture?

  22. m=50kg .05 m/s2 2 m/s2 m=2000 kg f= f = What direction are the forces applied in each picture? right left

  23. m=50kg .05 m/s2 2 m/s2 m=2000 kg f= f = No, the rock will accelerate faster. Will the rock and the van accelerate at the same rate?

More Related