→ Now use the phet and the image above to answer the following questions below.
V. The Moving Man Questions:
4. Each time the man stopped and took a break, what happened to the line on the Position-Time Graph (Blue Graph). Explain why.
Type Answer HERE:
5. Each time the man stopped and took a break, what happened to the line on the Velocity-Time Graph (Red Graph). Explain why.
Type Answer HERE:
6. What happened to the line on the Position-Time Graph (Blue Graph) when the man returned to the 0 meters? Explain why.
Type Answer HERE:
7. Now click the reset all button. Now grab the man and move him as slowly as you can till he reaches the house. Notice the graph. Again, click the reset all button. Now grab the man and move him as quickly as you can till he reaches the house. Notice the graph. They should look similar to the following images:
Looking at the Position-Time Graph (Blue Graph), what do you notice about the slope of the lines on each graph? (Hint: Slope is the measure of the steepness of the line. Think about going up a hill. Some have a small slope that is like no big deal to climb. Then there are those that have a huge slope. It’s so steep that your eyes get big and you decide, I’m not doing that.) Explain what you are seeing in the graphs above.
Type Answer HERE:
4. Each time the man stopped and took a break, the line on the Position-Time Graph (Blue Graph) became a horizontal line, indicating that the man was not moving and his position did not change. This happened because the man was not changing his position during the break.
5. Each time the man stopped and took a break, the line on the Velocity-Time Graph (Red Graph) dropped to zero, indicating that the man's velocity became zero. This happened because velocity is the rate of change of position, and if the position does not change (as during a break), the velocity becomes zero.
6. When the man returned to the 0 meters on the Position-Time Graph (Blue Graph), the line became a horizontal line at 0 meters. This happened because the man has reached his starting position, which is at 0 meters.
7. Looking at the Position-Time Graph (Blue Graph), the slope of the lines on each graph is steeper when the man is moved quickly compared to when he is moved slowly. This means that the man covers a larger distance in a shorter amount of time when he is moved quickly, resulting in a steeper slope. Conversely, when he is moved slowly, the distance covered is smaller in the same amount of time, resulting in a shallower slope.
4. Each time the man stopped and took a break, the line on the Position-Time Graph (Blue Graph) remained at a constant position. This is because when the man stopped, his position did not change over time.
5. Each time the man stopped and took a break, the line on the Velocity-Time Graph (Red Graph) dropped to zero. This is because when the man was not moving, his velocity (rate of change of position) was zero.
6. When the man returned to the 0 meters on the Position-Time Graph (Blue Graph), the line became flat at the 0 meters position. This is because the man reached his starting point and his position remained constant.
7. Looking at the Position-Time Graph (Blue Graph), the slope of the lines on each graph is different. When the man is moved slowly, the slope of the line is gentle, indicating a small rate of change in position over time. When the man is moved quickly, the slope of the line is steep, indicating a large rate of change in position over time. In other words, the steepness of the slope represents the speed at which the man is moving.
4. Each time the man stopped and took a break, the line on the Position-Time Graph (Blue Graph) remained horizontal, indicating that the position of the man did not change during those breaks. This is because the man was staying in one place and not moving.
5. Each time the man stopped and took a break, the line on the Velocity-Time Graph (Red Graph) dropped to zero, indicating that the man's velocity became zero during those breaks. Velocity is the rate of change of position over time, so when the man stopped, there was no change in his position and therefore no change in his velocity.
6. When the man returned to the 0 meters on the Position-Time Graph (Blue Graph), the line remained horizontal at 0 meters. This indicates that the man reached his starting point and had zero displacement from the starting point. The position-time graph shows the change in position over time, and since the man returned to his starting position, there was no change in his position.
7. Looking at the Position-Time Graph (Blue Graph) after clicking the reset all button and moving the man slowly and quickly to the house, we notice that the slope of the lines in each graph is different. When the man is moved slowly, the line on the graph has a smaller slope, indicating a slower increase in position over time. On the other hand, when the man is moved quickly, the line on the graph has a steeper slope, indicating a faster increase in position over time. This relates to the concept of velocity, where a steeper slope represents a higher velocity and a slower slope represents a lower velocity.