PHYS-2425: Position and Velocity vs. Time Graphs PHYS-2425: Position and Velocity vs. Time Graphs (B) A man moving from 0 to the house at a faster pace than above. Name 10 - 10- 8 5 Time Velocity (m/s) GOU Time Introduction. 3, ( 5 ) (s) When object is moving, we are often interested to learn about its direction of motion, position, velocity, -10 -10 etc. Equations can contain relevant information in a compact form, and they are very useful when one needs to describe the idealized situations. Explain your reasoning for the appearance of the graphs: Sometimes, however, when describing a real-life scenario, one might prefer to use a pictorial mathematical representation - a graph. As you have seen in your textbook, graphs of motion can take various forms such as position vs. time, velocity vs. time, etc. In this Lab, you will be using "The Moving Man" simulation to model the real-life situations and create graphs as their mathematical representations. Procedure. Go to http://www.colorado.edu/physics/phet and find "The Moving Man" simulation under the category of "motion." There are several youtube videos available that can help you understand this simulation, for (C) A man standing still at 4 m. example: https://www.youtube.com/watch?v=xmCvpsQRKyo. 1. After "The Moving Man" is open leave the position graph and the velocity graph open but close the 10 T 10 T Time acceleration graph by clicking the symbol in the upper right hand corner of the graph. Time (S) GOUT Velocity (m/s) Investigate Moving Man by dragging the dude around with your mouse. This will give you very jumpy lata, especially in the acceleration graph - why? Now try making the man move using the slider arrows. -10 -10 Use the playback features to look at the graphs. Explain your reasoning for the appearance of the graphs: 2. For each of the six scenarios below, PREDICT what the position vs. time and velocity vs. time will look like. Don't be afraid to be wrong - and don't cheat by looking at Moving Man first! (A) A man moving from the center of the screen (0 m) to the house (8m) at a slow, steady pace 10 - 10 - Position (m) - Time Velocity (m/s) of Time s ) ( 5 ) -10 -10 Explain your reasoning for the appearance of the graphs:PHYS-2425: Position and Velocity vs. Time Graphs PHYS-2425: Position and Velocity vs. Time Graphs (F) A man moving from 0 to the house, speeding up as he walks. (D) A man moving from 0 to the house at a fast pace then moving back to 0 at a slower pace. 10 T 10 - Time ( 5 ) 10- Position (m) Time Velocity ( m/s ) of 10- Time (s) -5T Position (m) of Time Velocity ( m/ s ) -10 -10 (5 ) Explain your reasoning for the appearance of the graphs: 10 -10 Explain your reasoning for the appearance of the graphs: (E A man moving from 8 m to the tree m at a fast pace. 10 10- Time ( 5 ) Position (m) ime Velocity (m/s ) G OUT (S ) 10 -10 Explain your reasoning for theappearance of the graphs:PHYS-2425: Position and Velocity vs. Time Graphs PHYS-2425: Position and Velocity vs. Time Graphs (I) A man wakes up from his nap under the tree and speeds up toward the house. He stops becausehe is 3. Use the Moving Man simulation to verify your predictions in Step 2. Correct your predicted worried that he dropped his keys. He stands still as he searches his pockets for his keys. Once he finds graphs with a different colored pen and correct your explanations as needed. them, he continues calmly to walk toward the house and then slows to a stop as he nears the door. 10- 10 T 4. Make new distance vs. time and velocity vs. time charts for each of the following scenarios. Predict Position (m) what you think the graphs will look like, and then use Moving man to verify or correct your predicted G OU Time Velocity (m/s) ( 5 ) of Time ( 5 ) graphs and reasoning with a different color pen. -10 -10 "G) The man stands still while he talks on his cell phone at the middle of the sidewalk, then walkstoward the house at a constant rate trying to get better cell reception. He comes to a sudden stop when the coverage is good (about a meter before the house) and stands still to finish hisconversation. Explain your reasoning for the appearance of the graphs: 10 T 10- Position (m) Tim Velocity ( m / s ) GOUT Time U OUT 2(5) ( 5 ) 10 -10 Explain your reasoning for theappearance of the graphs (J) The man starts three meters from the house and speeds up as he walks towards the tree. 10 T 10 - 5T Position (m) Tim Velocity (m/s) of Time 2(5) ( s ) -5T -10 H) The man starts close to the tree, then he stands still for a little while. After that he moves at a constant rate for a while, then slows gradually to a stop. Explain your reasoning for the appearance of the graphs: 10 T 10 T Position (m) GOUT Time Velocity ( m / s ) Time (5 ) ( 5 ) 10 Explain your reasoning for the appearance of the graphs:PHYS2425: Position and Velocity vs. Time Graphs 5. Write a possible scenario for the following graph. 1 Positio'n=3.62 m Position \\ H Time