1. Position versus Time Graphs Start off by getting a feel of how the equipment
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Question
1. Position versus Time Graphs Start off by getting a feel of how the equipment will graph the position of a cart moving on a track. The software will sense that the motion detector is attached and will open with both a position versus time graph (top graph) and a velocity versus time graph. To balance the track you may use the motion detector to help you. Adjust the height at both ends such that the cart's velocity is as close to a constant value for both "towards" and "away from" the motion detector. This default set of graphs won't have enough time to collect data, but you can extend the collection time. Click on "experiment" located on the tool bar. You will get a drop down menu. Click on "extend collection time" and you will notice that the time axis increases. Continue to click on "extend collection time" until you get just over 15 seconds on the time axis. A. Set the motion detector near the end of the track making sure that the motion detector senses the cart. Then, set the cart approximately 30 centimeters from the motion detector. Click on the "collect" button near the top of the screen and allow 5 seconds to pass with no motion of the cart. At the 5 second mark suddenly and quickly move the cart about 20 centimeters farther away from the motion detector, stopping the cart suddenly. Allow the cart to rest here for another 5 seconds. Then, suddenly and quickly, move the cart towards the motion detector by about 10 centimeters and stop. Allow the time to run out; the software will automatically stop taking data. Record this position data on the graph below 60 50 40 30 20 + 10 10 15 Time (s)Explanation / Answer
It is not possible for a line to be perfectly vertical in a position time graph. Position time graph gives the velocity or speed of an object.
Horizonatal lines on this graph implies that time is keep on increaing but the position of the object is same as it was. Inclined lines gives us an idea about the position and time of an object, means time as well as position both are changing. But suppose any vertical line is there on this graph that implies that there is a change in the position of the object but time is constant (not changing) and practically it is not possible.
Any how we are using a special term in the physics for showing this kind of velocity (for solving numerical questions only) where time is contant but there is some velocity, that term is known as "Instantaneous Velocity". But still practically this does not exit.
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