PPT-Acceleration

The pitcher throws The ball speeds toward the batter Off the bat it goes Its going going gone A home run Before landing the ball went through several changes in motion It sped up in the pitchers hand and lost speed as it traveled toward the batter The ball stopped when it hit the bat changed direction sped up again and eventually slowed down Most examples of motion involve similar changes In fact rarely does any objects motion stay the same for very long. (Fermi acceleration at shock: most standard, nice powerlaw, few free parameters). main . signatures to . be determined: . E. min . , . E. max. [. Ã. timescale . t. acc. (E. ) ], . spectral slope . What Is Motion?. Motion. is when an object changes place or position. To properly describe motion, you need to use the following:. Start and end position?. Movement relative to what?. How far did it go?. Unit 9.2. m/s. 2. average acceleration. a = . D. v. D. t. 50 m/s – 25m/s. 4s – 2s. = . = . 12.5 m/s. 2. B. C. A. A. C. none. B. n. f. –. . n. i. t. f. –. . t. i. Practice. : A pool ball travelling at 2.5 m/s towards the cushion bounces off at 1.5 m/s. If the ball was in contact with the cushion for 0.20 s, what is the ball’s acceleration? (Assume towards the cushion is the positive direction.). in a Developing Turbulence. . Shuichi M. ATSUKIYO. . ESST Kyushu Univ.. Collaborator : T. . Hada. Outline . Background. -- motivation. -- acceleration processes in turbulent plasmas. -- parametric instability (PI). Galileo defined acceleration as the rate of change of velocity.. Formula!. a. = . Δ. v / t. Things that affect acceleration: . Speeding up. Slowing down. Changing direction. Time. Free Fall. When air resistance does not affect the motion of an object, then the object is in free fall.. Chapter Goal: To extend the description of motion in one dimension to include changes in velocity. This type of motion is called . acceleration. .. © 2015 Pearson Education, Inc. . Chapter 3: Acceleration. A . vector quantity. is a quantity that has both magnitude and direction. Velocity, acceleration, and force are examples of vector quantities. . A . scalar quantity. is a quantity that has magnitude, but no direction. Time, mass, volume, and speed are examples of scalar quantities.. ACT/PSAE practice. Intro to acceleration. What does it mean in common language?. What does it mean to a physicist? (That’s you!). First equation of acceleration. A = v/t. Standard unit for acceleration: m/s^2. 2.7 m/s. 2. While traveling along a highway a driver slows from 24 m/s to 15 m/s in 12 seconds. What is the automobile’s acceleration? (Remember that a negative value indicates a slowing down or deceleration.) . Separation of motion in x-and y-direction . Equations for 2-d kinematics at constant acceleration. Projectile motion. Lecture 4: Motion in two dimensions. Velocity. , . .  . Position vector . Bell Ringer 11-7-13. Compare and Contrast Speed, Velocity and Acceleration. is the speed of an object in a particular direction. MYP Unit Question: What Moves YOU!!. Area of Interaction: Human Ingenuity. Acceleration is a measure of . the change in velocity per unit of time. When the velocity of an object is changing, it is . accelerating. Negative acceleration: . slowing down. Positive acceleration: . V. ector quantity: . magnitude (value) & direction. R. ate . at which an object changes its velocity. . “. How fast an object is getting faster”. If the velocity of an object is changing, it is accelerating!. What is acceleration?. If you’re traveling in a car at a constant speed of 50 mph, are you accelerating?. No, you’re not. . Acceleration is the rate of change of velocity. . Acceleration. In order for acceleration to occur, velocity MUST be .