3-1 Acceleration PDF

3-1 Acceleration  Learning Objectives By the end of this lesson : Students will be able to Define acceleration. 3.1 Students will be able to Relate velocity and acceleration Acceleration to the motion of an object....

3-1 Acceleration  Learning Objectives By the end of this lesson : Students will be able to Define acceleration. 3.1 Students will be able to Relate velocity and acceleration Acceleration to the motion of an object. Textbook Page 60 Students will be able to Create velocity-time graphs.  Key Vocabulary Acceleration 3.1 Acceleration Velocity- time Textbook Page 60 Graph Average Acceleration Instantaneous Acceleration  Warm UP Fill In Using The Below Examples Link to Prior 9 m/s West 3 km/h 6 m/s East Learning 9 m/s 8 m/s West 10 m/s Velocity Speed 9 m/s West 3 km/h 6 m/s East 9 m/s 2 Mins 8 m/s West 10 m/s  Changing Velocity You can feel a difference between uniform and 3.1 nonuniform motion. Acceleration When you move in a Textbook Page 60 nonuniform motion, you feel pushed or pulled. In contrast, when you are in uniform motion and your eyes are closed, you feel as though you are not moving at all.  Uniform vs. Nonuniform Motion 3.1 Acceleration Textbook Page 60  Motion Diagram 3.1 Acceleration a. The jogger is motionless b. Equally spaced images Textbook Page 60 show her moving at a constant speed c. She is speeding up d. She is slowing down Figure1 The distance the jogger moves in each time interval indicates the type of  Particle Model diagram Changing Velocity If an object speeds up, each subsequent velocity vector is longer. 3.1 If the object slows down, each vector is shorter than the Acceleration previous one. Textbook Page 61 Both types of motion diagrams give an idea of how an object’s velocity is changing.  Displaying acceleration on a motion diagram Learning Acceleration is defined as the rate at which an Objectives object’s velocity changes. Define acceleration. Relate velocity and acceleration to the motion of an object. Create velocity-time graphs. 3.1 Acceleration Textbook Page 61  Finding acceleration vectors Learning Objectives Define acceleration. Relate velocity and acceleration to the motion of an object. Create velocity-time graphs. 3.1 Acceleration Textbook Page 61  Direction of Acceleration Learning Objectives Define acceleration. Relate velocity and acceleration to the motion of an object. Create velocity-time graphs. 3.1 Acceleration Textbook Page 62  Direction of Acceleration Speeding Up Slowing Down Learning Objectives Define acceleration. Relate velocity and acceleration to the Car’s acceleration and motion of an object. Car’s acceleration and velocity are in the SAME velocity are in the Create velocity-time graphs. DIRECTION OPPOSITE DIRECTION 3.1 Acceleration Describe the motion of an object if its Textbook Page 62 velocity and acceleration vectors have opposite signs. The object is slowing down  Velocity-Time Graph Learning Objectives Velocity is plotted on the vertical axis and time is plotted on the horizontal axis Define acceleration. Relate velocity and acceleration to the motion of an object. Create velocity-time graphs. 3.1 Acceleration Textbook Page 63  Reading Velocity-Time Graph Learning Objectives Define acceleration. Zero Slope Relate velocity and -v acceleration to the e lope +ve S Sl motion of an object. op e cre a ses i n Create velocity-time graphs. a ses decre 3.1 Zero Slope Acceleration Textbook Page 63  Reading Velocity-Time Graph Learning Objectives Define acceleration. Relate velocity and acceleration to the motion of an object. Create velocity-time graphs. 3.1 Acceleration Describe the meaning of a line crossing the Textbook Page 63 x-axis in a velocity – time graph. The object’s speed decreases to zero.  Average Acceleration Learning Is the change in its velocity during Objectives Average some measurable time interval Acceleratio divided by that time interval Define acceleration. n Relate velocity and ∆𝒗 𝒗𝒇 −𝒗𝒊 acceleration to the 𝒂≡ = motion of an object. ∆𝒕 𝒕 𝒇 − 𝒕𝒊 Create velocity-time This symbol means that the left graphs. hand side of the equation if defined by the right hand side 3.1 𝟐 Acceleration Textbook Page 64 𝑨𝒄𝒄𝒆𝒍𝒆𝒓𝒂𝒕𝒊𝒐𝒏 𝒊𝒔 𝒎𝒆𝒂𝒔𝒖𝒓𝒆𝒆𝒅 𝒊𝒏𝒎/ 𝒔 meters per second squared  Instantaneous Learning Acceleration Objectives Define acceleration. The change in an object’s velocity at Relate velocity and acceleration to the an instant of time motion of an object. Create velocity-time How is instantaneous acceleration different graphs. from average acceleration ? 3.1 Instantaneous acceleration is the change in velocity at Acceleration an Textbook Page 64 instant of time, but average acceleration is the change in  Instantaneous Acceleration You can determine the instantaneous acceleration of an object by drawing a tangent line on the velocity time graph at any point of time in which you want. 3.1 Acceleration Textbook Page 64  Instantaneous Acceleration The slope of this tangent line is equal to the instantaneous Learning acceleration. Objectives Define acceleration. Relate velocity and acceleration to the motion of an object. Create velocity-time graphs. 3.1 Acceleration Textbook Page 64  Calculating Acceleration Learning Objectives Define acceleration. Relate velocity and acceleration to the motion of an object. Create velocity-time graphs. 3.1 Acceleration Textbook Page 65  Example 1 Learnin g Define acceleration. Objectiv es Relate velocity and acceleration to the motion of an object. Create velocity-time graphs. 3.1 Acceleration Textbook Page 65  Example 1 Learnin g Define acceleration. Objectiv es Relate velocity and acceleration to the motion of an object. Create velocity-time graphs. 3.1 Acceleration Textbook Page 65  Example 1 Learnin g Define acceleration. Objectiv es Relate velocity and acceleration to the motion of an object. Create velocity-time graphs. 3.1 Acceleration Textbook Page 65  3-1 Acceleration Applications In Groups Textbook Page 66 10 Mins  3-1 Acceleration Check your answers In Groups Textbook Page 66  3-1 Acceleration Check your answers In Groups a. 5.0 to 15.0 s b. 0.0 to 5.0 s Textbook Page 66 c. 15.0 to 20.0 s  3-1 Acceleration Check your answers In Groups Textbook Page 66  3-1 Acceleration Check your answers In Groups Textbook Page 66  3-1 Acceleration Check your answers In Groups Textbook Page 66  Example 2 Learnin g Define acceleration. Objectiv es Relate velocity and acceleration to the motion of an object. Create velocity-time graphs. 3.1 Acceleration Textbook Page 66  Example 2 Learnin g Define acceleration. Objectiv es Relate velocity and acceleration to the motion of an object. Create velocity-time graphs. 3.1 Acceleration Textbook Page 66  Example 2 Learnin g Define acceleration. Objectiv es Relate velocity and acceleration to the motion of an object. Create velocity-time graphs. 3.1 Acceleration Textbook Page 66  3-1 Acceleration Applications In Groups Textbook Page 67 10 Mins  3-1 Acceleration Check your answers In Groups a) Textbook Page 67 b)  3-1 Acceleration Check your answers In Groups Textbook Page 67  Learning Check Question 1 : Which of the following statements correctly Learnin g define acceleration? Define acceleration. Objectiv es Relate velocity and A. Acceleration is the rate of change of displacement of an acceleration to the motion of an object. object. Create velocity-time graphs. B. Acceleration is the rate of change of velocity of an object. 3.1 C. Acceleration is the amount of distance covered in unit time. Acceleration D.Acceleration is the rate of change of speed of an object. Reason: The rate at which an object’s velocity changes is called acceleration of the object.  Learning Check Question 2 : What happens when the velocity vector and Learnin the acceleration vector of an object in motion are in same direction? g Define acceleration. Objectiv A. The acceleration of the object increases. es Relate velocity and acceleration to the motion of an object. B. The speed of the object increases. Create velocity-time graphs. C. The object comes to rest. 3.1 D. The speed of the object decreases. Acceleration Reason: When the velocity vector and the acceleration vector of an object in motion are in same direction, the speed of the object increases.  Learning Check Question 3 : On the basis of the velocity-time graph of a Learnin car moving up a hill, as shown on the right, g determine the average acceleration of the car? Define acceleration. Objectiv es Relate velocity and acceleration to the A. 0.5 m/s2 motion of an object. B. -0.5 m/s2 Create velocity-time graphs. C. 2 m/s2 3.1 Acceleration D. -2 m/s2  Learning Check Answer 3 : On the basis of the velocity-time graph of a car moving up a hill, as shown on the right, determine the average Learnin acceleration of the car? g Define acceleration. Objectiv es Relate velocity and acceleration to the motion of an object. Create velocity-time graphs. 3.1 Acceleration A. 0.5 m/s2 C. 2 m/s2 B. -0.5 m/s2 D. -2 m/s2