One-Dimensional Kinematics. One Dimensional Kinematics  Objective: Becoming familiar with Kinematics. We will study terms such as scalars, vectors, distance,

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Presentation transcript:

One-Dimensional Kinematics

One Dimensional Kinematics  Objective: Becoming familiar with Kinematics. We will study terms such as scalars, vectors, distance, and displacement

Definitions:  One-dimension: straight line, to the left or to the right, up or down, east or west, etc.  Kinematics: the study of motion using words, numbers, graphs and equations

From the following which are scalars and which are vectors?  (A) 5 meters  (B) 30 meters/second East  (C) 20 degrees Celsius  (D) 4000 calories  (E) -10 centimeters

Visual describing distance vs displacement   4:12 – 4:50

Concept Question  Can you drive your car in such a way that the distance it covers is (a) greater than (b) equal to, or (c) less than the magnitude of its displacement?  In each case, give an example if your answer is yes, explain why not if your answer is no.

Exit Ticket  What was easy to understand?  What was confusing to understand?  Any suggestions?

DO NOW:  Objective: Discovering the difference between speed and velocity  You walk.5mi East to your friends house, then you walk.3 miles West to the park.  What is the distance you traveled?  What is your displacement?

Average Speed Problem:  My wife ran a marathon(26.2 miles) with a speed of 2.4 meters/second. How long did it take her to run the marathon?

Average Speed Visual: 

Need help with Dimensional Analysis:  algebra/v/dimensional-analysis-units-algebraically algebra/v/dimensional-analysis-units-algebraically  Go to and type in Dimensional Analysis (6 minute video)

Conceptual Checkpoint:

Average Velocity Problem:  __(Name)_ sprints _______ meters in __________ seconds. If he/she takes 50 seconds to walk back to the starting line. If the “sprint direction” is taken to be positive, what is:  A) The average sprint velocity?  B) The average walking velocity?  C) The average velocity for the complete trip?

DO NOW:  It was a dark and stormy night, when suddenly you saw a flash of lightning. 3.5 seconds later you heard the thunder. Given that the speed of sound in air is about 340 m/s, how far away was the lightening bolt?

DO NOW (Honors):  A finch rides on the back of a Galapagos tortoise, which walks at the stately pace of 0.06 m/s. After 2.0 minutes the finch tires of the tortoise’s slow pace, and takes flight in the same direction for another 2.0 minutes at 12 m/s. What was the average speed of the finch for the 4- minute interval?

Visual of position vs. time graph   7:00 – 9:20

Graph #1 (position vs. time)

Graph #2 (Position vs. time)

Average velocity vs Instantaneous Velocity  Instantaneous Speed - the speed at any given instant in time.  Average Speed - the average of all instantaneous speeds; found simply by a distance/time ratio.