Kinematics

Kinematics.

Description ,Lab 2: Kinematics First, you are going to take a video of something moving at a constant velocity. Make sure your phone or other video capturing device does not move Include evenly spaced waypoints for judging distance. There are many ways of doing this: • Using dimensions of background items in the video (such as width of bricks or floor tiles) • Including a ruler in the shot (this can sometimes be difficult to read depending on the angle) • By marking off the space at intervals with a pen or pencil • By putting down pieces of tape or other marking items at intervals Note down the distance between waypoints in the video so that you know it for later. Doing video analysis: There are several ways of doing this. One way is to install Tracker on a computer. The other is to use the hudl technique app on an iphone. If neither works, please contact me and we will figure something out individually. The hudl technique app works on an iphone (it should be free with ads; you may have to pretend to be a sports coach)). People (like me) with an android are out of luck; the android hudl apps do not have video analysis functionality. Using hudl technique: We are going to find the location of the object at different times (the table to record the times is on next page). On hudl, you want to load your video. At the bottom, you want to adjust your slider to the start of the motion, and then zero out your time (I you click either on the time or the slider and the time should change to zero). You should then be able to pinch to zoom in on your object to see exactly when it passes each waypoint (adjust the time with the silder). Some newer iphones have a very high video frame rate, so you may not see the time value change for each new frame of the video. Sorry, I can’t offer you much help with hudl. If it doesn’t work, I would recommend using Tracker instead, which has more documentation. Using Tracker https://physlets.org/tracker/ You want to see exactly where the object is at different points in time. There’s a quickstart video here: https://www.youtube.com/watch?v=n4Eqy60yYUY Here is a more detailed introductory video for tracker: https://www.youtube.com/watch?v=La3H7JywgX0 You don’t actually need to do everything that they’re doing (although if you do, that’s fine). You should just have motion in one direction, and you just need to zero the time when your motion starts, and then note what the time is as it passes each waypoint. You should be able to figure out the distance from the waypoints. You do not need to set up a spatial coordinate system and mark each of the places, but you can if it is helpful to you. Time Distance

Kinematics