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©2008 by W.H. Freeman and Company Displacement There is a distinction between distance and displacement. Displacement (blue line) is how far the object is from its starting point, regardless of how it got there. Distance traveled (dashed line) is measured along the actual path.
©2008 by W.H. Freeman and Company Displacement Left: Displacement is positive. Right: Displacement is negative. The displacement is written:
©2008 by W.H. Freeman and Company Average Velocity Speed: how far an object travels in a given time interval Velocity includes directional information:
©2008 by W.H. Freeman and Company A particle at t1 = -2.0 s is at x1= 3.4 cm and at t2 = 4.5 s is at x2= 8.5 cm. What is its average velocity? Can you calculate its average speed from these data? The average velocity is given by The average speed cannot be calculated. To calculate the average speed, we would need to know the actual distance traveled, and it is not given.
©2008 by W.H. Freeman and Company An airplane travels 3100 km at a speed of 790 km/h and then encounters a tailwind that boosts its speed to 990 km/h for the next 2800 km. What was the total time for the trip? What was the average speed of the plane for this trip? The average speed of the plane for the entire trip is. The average speed for each segment of the trip is given by, so for each segment. For the second segment, Thus the total time is For the first segment,
©2008 by W.H. Freeman and Company Chapter 2 Motionin One Dimension.
© 2005 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching their.
Chapter 2: Kinematics in one Dimension Displacement Velocity Acceleration HW2: Chap. 2: pb.3,pb.8,pb.12,pb.22,pb.27,pb.29,pb.46.
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Describing Motion: Kinematics in One Dimension. Sub units Reference Frames and Displacement Average Velocity Instantaneous Velocity Acceleration Motion.
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© 2014 Pearson Education, Inc. This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching their.
Motion graphs 1.Position (displacement) vs. time 2.Distance vs. time 3.Speed vs. times 4.Velocity vs. time 5.Acceleration vs. time ________.
Vectors: Displacement and Velocity. Vectors Examples of vectors: displacement velocity acceleration.
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Describing Motion 1. Graphing Motion Graphing is a good way to easily show motion. Your data will determine which graph that you use. The types of graphs.
Honors Physics. Both were running, but the other disciple outran Peter and reached the tomb first. John 20:4.
Kinematics. Kinematics-What is it? Kinematics is the study of motion. –Motion is always defined in terms of change in location. Locations or Positions.
DISTANCE VS DISPLACEMENT SPEED VS VELOCITY. DISTANCE – scalar quantity DISPLACEMENT – vector quantity A car travels 50 km to the East and then 20 km to.
A scalar quantity has magnitude (size) only, but no direction. Scalar: Examples include: time, mass, distance and speed. Vector: A vector quantity has.
Chapter 3 Motion (Ewen et al. 2005) Objectives: Distinguish between speed and velocity Use vectors to illustrate and solve velocity problems.
Aim: How can we calculate average velocity when distance is unknown? Do Now: What is the average velocity between A and B? Velocity (m/s) Time (s)
Motion Definition Speed A change in position over time Measures the rate of motion (how fast something is going) Speed = distance (miles, km, m, in, cm,
SECT. 3-A POSITION, VELOCITY, AND ACCELERATION. Position function - gives the location of an object at time t, usually s(t), x(t) or y(t) Velocity - The.
Chapter 2: Motion in One Dimension. Displacement Change in position of an object Frame of reference ◦A point against which position is measured Example:
UNIT TWO: Motion, Force, and Energy Chapter 4Motion Chapter 5Force Chapter 6Newton’s Laws of Motion Chapter 7 Work and Energy.
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