Speeding Up and Slowing Down? 1-1-3 Acceleration.

Slides:

Advertisements

Similar presentations

Speeding Up and Slowing Down

Advertisements

Acceleration Acceleration Velocity-time graph Questions.

Change in Velocity You are probably most familiar with the velocity changes of a moving bus or car. Anytime a vehicle is speeding up or slowing down,

Acceleration  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.

Distance & Position AB Can you state the distance between the two cars?

Acceleration Unit 1 Lesson 2.

1D Kinematics. Distance Time (DT) Graph Slope of a DT graph gives speed D This is a graph of an object not moving. No slope = No speed T.

1_3 Velocity time graphs Find the area of these shapes. 03 September Find the gradient of these lines yxyx.

Graphing Motion Position vs. Time Stationary objects

One Dimensional Motion AP Physics C. Terms Displacement vs. Distance Displacement: Change in position (vector) Distance: How far an object has travelled.

Negative 10 Miles per Hour? Velocity and Speed.

SECTION 2.4 HOW FAST Define velocity.

MHS Physics Department Unit 2-2 Acceleration Acceleration is the rate of change of velocity. Since velocity is a vector, acceleration not only occurs when.

Things to know!. Velocity-Time Graphs A velocity-time (V-T) graph shows an object’s velocity as a function of time. A horizontal line = constant velocity.

Velocity Time Graph.

Unit II: Fast and Furious

Lab 4 – Accelerated Motion Lab

Lecture: Acceleration A vector quantity CCHS Physics.

Acceleration and non-uniform motion.

Kinematics- Acceleration Chapter 5 (pg ) A Mathematical Model of Motion.

Section 2 Acceleration.  Students will learned about  Describing acceleration  Apply kinematic equations to calculate distance, time, or velocity under.

Acceleration- Change in Velocity

Velocity-Time Graphs What is it and how do I read one?

Which line represents the greater speed? Graphing motion The greater the speed, the steeper the slope.

Chapter 4. Acceleration is the rate at which velocity changes. **Note: because acceleration depends upon velocity, it is a vector quantity. It has both.

Acceleration “lets go faster!”. Some background Before we start acceleration lets review velocity. Velocity is the change in position over the change.

Acceleration. How will the box move? 16 N8 N Key Variable - New Acceleration –the rate of change in velocity. Measured – indirectly using velocity, distance.

Acceleration- Change in Velocity occurs when an object _____________________ occurs when an object ______________ in speed. occurs when an object __________.

= constant speed forward = no speed, stopped = constant speed; negative direction Time (s) Distance mDistance m.

Speed and Acceration. distance Total distance an object travels from a starting point to ending point.

Velocity Acceleration AND. Changing velocities means it is NON-uniform motion - this means the object is accelerating. m/s 2 m/s /s OR = ∆t∆t ∆v∆v a P(m)

Relationship between time, displacement, velocity, acceleration. Kinematic.

Do you know your x-t graphs?. x t Slowing Down (in the positive direction) Negative Acceleration 

VELOCITY TIME GRAPHS. The Velocity vs. Time Graph Velocity (m/s) Time (s) ∆v ∆t Velocity vs. time.

3.2 Notes - Acceleration Part A. Objectives  Describe how acceleration, time and velocity are related.  Explain how positive and negative acceleration.

l The study of HOW objects move: è Graphs è Equations è Motion maps è Verbal descriptions Kinematics-1.

Velocity and Acceleration. Velocity Describes both speed and direction of an object. Describes both speed and direction of an object. How can an object.

 Used to describe the velocity of a moving object during its motion.  depict the direction and relative speed by a vector arrow.

What does it mean to accelerate anyway?? TO ACCELERATE YOU MUST CHANGE YOUR VELOCITY!! VELOCITY CHANGES IF…. 1. Increase Speed 2. Decrease Speed 3. Change.

Accelerated Motion. is changing either the speed or direction, or both, of motion. Acceleration is the rate of change of velocity, in other words, how.

Lecture: Acceleration A vector quantity CCHS Physics.

Instantaneous Velocity The velocity at an instant of time. For a curved graph, use very small intervals of time.

Kinematics Kinematics is the science of describing the motion of objects using words, diagrams, numbers, graphs, and equations.

Acceleration in Graphs 9/27/2011. Position vs. Time Graph For this graph, where is the velocity positive? Where is the velocity zero? Where is the velocity.

Chapter 1.3 Acceleration. Types of Acceleration  Acceleration is a vector quantity  Positive Acceleration  1. when change in magnitude and direction.

Meanings of the Derivatives. I. The Derivative at the Point as the Slope of the Tangent to the Graph of the Function at the Point.

Objectives: Evaluate the difference between velocity and acceleration. Solve simple acceleration problems in one dimension.

Acceleration Acceleration is the rate of change of velocity.

Chapter 11: Motion Section 11.3 Acceleration.

Motion. Motion terms and their definitions: position:distance and direction from a reference point motion:change of position over a time interval example:

Acceleration. Definition Any change in velocity is acceleration What are the possible causes of acceleration? Speeding up Slowing down Changing direction.

Mechanics 1 : Kinematics

Non-Constant Velocity

Consider a car moving with a constant, rightward (+) velocity - say of +10 m/s. If the position-time data for such a car were.

Kinematics Kinematics is the science of describing the motion of objects using words, diagrams, numbers, graphs, and equations.

Motion in One Dimension

Acceleration The rate at which velocity changes.

Distance & Position Can you state the distance between the two cars? A

11.6 Acceleration - Review.

Distance & Position Can you state the distance between the two cars? A

The integral represents the area between the curve and the x-axis.

Area under V-T graphs, Acceleration, and Acceleration Graphs

Chapter 4, Section 3 Acceleration.

Speed Velocity Acceleration

Velocity vs Time Graphs – Notebooks

3.1 Acceleration.

Velocity of a Shopper at the Mall

Motion Graphs 2 x v a.

Presentation transcript:

Speeding Up and Slowing Down? Acceleration

ACCELERATION –change in VELOCITY occuring over TIME –measured in METERS PER SECOND 2 –VECTOR Positive Velocity Positive Acceleration Speeding up in + direction Negative Velocity Negative Acceleration Speeding up in - direction Positive Velocity Negative Acceleration Slowing down Eventually speeds up in – direction! Negative Velocity Positive Acceleration Slowing down Eventually speeds up in + direction!

Equations “Acceleration is a rate of change in velocity” “The slope of a v-t graph tells what the ACCELERATION IS DOING!” “An object’s velocity at any point in time can be found by considering: - its starting velocity - its acceleration - the amount of time over which it accelerates”

Example Two cars start at the same point. Car A starts with a velocity of -5 meters per second while Car B starts with a velocity of +3 meters per second. At the end of 15 seconds car A has a velocity of +25 meters per second. v f = v i + at +25 m/s = -5 m/s + a(15 s) a = +2 m/s 2 v f = v i + at v f = +3 m/s + (+2 m/s 2 )(4.0 s) v f = +11 m/s –At what rate did car A accelerate?–If Car B has the same acceleration, what is its speed at the end of 4.0 seconds?