1 / 25

C H A P T E R   2 Kinematics in One Dimension

C H A P T E R   2 Kinematics in One Dimension. Mechanics. The study of Physics begins with mechanics. Mechanics. The study of Physics begins with mechanics. Mechanics is the branch of physics that focuses on the motion of objects and the forces that cause the motion to change. .

tuwa
Download Presentation

C H A P T E R   2 Kinematics in One Dimension

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. C H A P T E R   2Kinematics in One Dimension

  2. Mechanics The study of Physics begins with mechanics.

  3. Mechanics The study of Physics begins with mechanics. Mechanics is the branch of physics that focuses on the motion of objects and the forces that cause the motion to change.

  4. Mechanics The study of Physics begins with mechanics. Mechanics is the branch of physics that focuses on the motion of objects and the forces that cause the motion to change. There are two parts to mechanics: Kinematics and Dynamics.

  5. Mechanics The study of Physics begins with mechanics. Mechanics is the branch of physics that focuses on the motion of objects and the forces that cause the motion to change. There are two parts to mechanics: Kinematics and Dynamics. Kinematics deals with the concepts that are needed to describe motion, without any reference to forces. Chapter 2: Kinematics in one dimension Chapter 3: Kinematics in two dimensions

  6. Mechanics The study of Physics begins with mechanics. Mechanics is the branch of physics that focuses on the motion of objects and the forces that cause the motion to change. There are two parts to mechanics: Kinematics and Dynamics. Kinematics deals with the concepts that are needed to describe motion, without any reference to forces. Chapter 2: Kinematics in one dimension Chapter 3: Kinematics in two dimensions Dynamics deals with the effect that forces have on motion. Chapter 4: Dynamics

  7. Distance and Displacement

  8. Distance and Displacement Starting from origin, O a person walks 90-m east, then turns around and walks 40-m west.

  9. Distance and Displacement Starting from origin, O a person walks 90-m east, then turns around and walks 40-m west. Q: What is the total walked distance?

  10. Distance and Displacement Starting from origin, O a person walks 90-m east, then turns around and walks 40-m west. Q: What is the total walked distance? A: 130-m

  11. Distance and Displacement Starting from origin, O a person walks 90-m east, then turns around and walks 40-m west. Q: What is the total walked distance? A: 130-m Q: What is the displacement?

  12. Distance and Displacement Starting from origin, O a person walks 90-m east, then turns around and walks 40-m west. Q: What is the total walked distance? A: 130-m Q: What is the displacement? A: 50-m, due east.

  13. Displacement The displacementΔx is a vector that points from the initial position to the final position. SI Unit of Displacement: meter (m)

  14. 2.2 Speed and Velocity • Average Speed • Average Velocity • Instantaneous Velocity • Instantaneous Speed

  15. Average Speed Units for speed: m/s, MPH, kmPH.

  16. Average Velocity Units for velocity: m/s, MPH, kmPH.

  17. Instantaneous Velocity and Speed The instantaneous velocityv indicates how fast an object moves and the direction of the motion at each instant of time. The magnitude of the instantaneous velocity is called the instantaneous speed, and it is the number (with units) indicated by the speedometer.

  18. Acceleration

  19. Acceleration Units: m/s2, cm/s2

  20. Instantaneous acceleration Acceleration at a particular instant is called instantaneous acceleration.

  21. Deceleration

  22. Deceleration An object speeds up when the acceleration and velocity vectors point in the same direction.

  23. Deceleration An object speeds up when the acceleration and velocity vectors point in the same direction. Whenever the acceleration and velocity vectors have opposite directions, the object slows down and is said to be “decelerating.”

  24. Deceleration An object speeds up when the acceleration and velocity vectors point in the same direction. Whenever the acceleration and velocity vectors have opposite directions, the object slows down and is said to be “decelerating.” Example 4: A drag racer crosses the finish line, and the driver deploys a parachute and applies the brakes to slow down. The driver begins slowing down when t0 = 9.0 s and the car's velocity is v0 = +28 m/s. When t = 12.0 s, the velocity has been reduced to v = +13 m/s. What is the average acceleration of the dragster?

  25. Kinematics Equations

More Related