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 0 answersPost by kathy jarman on November 16, 2012Regarding slide time 17:40ish, wouldn't the average speed be 10/2/5 = 1 m/s since the object is starting from rest? If not, when would you divide by 2 to get the average? 0 answersPost by Jenny Hua on October 5, 2011Thank you. This was helpful. 2 answersLast reply by: Mudit GargThu Apr 25, 2013 10:13 AMPost by Padamjit Sandhu on July 3, 2010Is the instantaneous velocity is a Vector Quantity. If yes and do speedometer in car tell us instantaneous velocity or speed.i think that instantaneous speed is equal to instantaneous velocity of an object because both are take in very small interval of time and in this time period direction of object is same because it is just differentiation of a motion of object..! Im So Confused HelP Me :)

### Motion in One Dimension

• The position of a particle moving along the x-axis is the x-coordinate of the particle; it may be positive or negative.
• Displacement is the final position minus the initial position; it may be positive or negative.
• Average speed = Distance/Time.
• Average velocity = Displacement/ Time.
• Instantaneous velocity is the rate of change of position.
• Instantaneous acceleration is the arte of change of velocity.
• If acceleration is constant, some simple relations hold among the displacement, velocity, acceleration, and time.

### Motion in One Dimension

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

• Intro 0:00
• Position, Distance, and Displacement
• Position of the Object
• Distance Travelled by The Object
• Displacement of The Object
• Average Speed Over a Certain Time Interval 14:46
• Example Of an Object
• Example: Calculating Average Speed
• Average Velocity Over a Time Interval 22:22
• Example Calculating Average Velocity of an Object
• Instantaneous Velocity 30:45
• Average Acceleration Over a Time Interval 40:50
• Example: Average Acceleration of an Object
• Instantaneous Acceleration 47:17
• Example: Acceleration of Time T
• Example with Realistic Equation
• Motion With Constant Acceleration: Kinematics Equation 53:39
• Example: Motion of an Object with Constant Acceleration
• Extra Example 1: Uniformly Accelerated Motion
• Extra Example 2: Catching up with a Car
• Extra Example 3: Velocity and Acceleration