Motion and Speed

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Practice 1st Semester Lesson Objectives

Density Practice          3 Types of Rocks Practice         Element and Compound Practice

Energy Conversion Practice      Complete this Speed Graphing Interactive 

Properties of Matter Team Matching Game  

Virtual Lab Physical and Chemical Properties Physical and chemical changes in matter Practice Questions    Action Graphing Iphone APP Motion & Speed Things to know.... Speed:  Distance divided by time. SI unit for speed is meters per second (mps) Velocity: Speed with a direction. Example: 35mph is speed. 35 mph north is velocity.Acceleration:  A change in direction, speeding up, or slowing down.Motion: A change in position. When an object moves from one spot to another.Reference Point: Something that appears to be stationary, that is used to determine motion.  The motion of an object can be described by its position, direction of motion and speed. An unbalanced force acting on an object changes its speed and/or direction of motion. Objects moving in circles must experience force acting toward the center. Source of image:  http://en.wikipedia.org/wiki/Elephant Motion: a change in position, measured by distance and time Source of images: http://wifflegif.com/tags/778-octopus-gifs An object is said to be in motion when its position changes in relation to a reference point An object’s motion can be described and represented graphically according to its position, direction of motion, and speed Motion of objects can be represented on a distance vs. time line graph, with distance traveled as the vertical (“y”) axis and time as the horizontal (“x”) axis.   The steepness and slant of the motion line vary depending on the speed and direction of the moving objects. A straight horizontal line indicates an object at rest Reference point: the point from which movement is determined. A reference point can be any object or location.  It can be moving or stationary (unmoving).  The motion of another object can be compared to the reference point to determine whether the object is moving relative (moving toward, away from, or neither) to the reference point. In the image, if the tree is the reference point, the car is moving away from from the reference point as it goes from position 1 to position 2. Source of images: https://www.superteachertools.net/jeopardyx/answerkey.php?game=1389195356 An object to compare a moving object to To measure movement, some point must be considered as nonmoving Earth is the most common frame of reference      Speed: the distance traveled by a moving object per unit of time. To calculate speed, use the equation   Speed = distance / time Speed only gives distance and time. Speed describes the change in an object’s position over a period of time, and is measured in units such as meters per second or miles per hour PRACTICE WORD PROBLEMS Average speed: the speed of moving objects is not always constant: Average speed = total distance / total time Average speed takes into account the different speeds at which an object moves over a period of time Average speed is calculated by dividing the total distance traveled by the change in time, ignoring any changes in motion or direction during its travel Velocity: speed in a given direction. Velocity gives distance, time, and the direction of travel Graphing Speed Relative Motion: See how motion is observed by the person observing it. Distance Time Graph Activity: Interactive web page that lets you create your own distance-time graph by flying a space ship Distance Time Graph Partner Activity: For 2 students - interactive web page that lets one person create the graph and the second person attempts to recreate the same graph by moving a second spaceship across the screen Need for Speed: Speed, Direction, and Velocity with a car Despicable Me - Vector Clip