science
Maria walks at a constant speed of 2 m/s for 8 seconds. a. Draw a speed vs. time graph for Maria's motion. b. How far does she walk?
------------- D= 2x8= 16m
Between which times is the speed zero for the motion shown on the position vs. time graph in Figure 4.16
At the origin, going fastest at constant speed
Which of the three graphs below corresponds to the position vs. time graph in Figure 4.16?
C
The runners in Figure 4.15 are racing. Predict which runner will get to the finish line of the race first.
Joel
The graph in Figure 4.15 shows the position and time for two runners in a race. Who has the faster speed, Robin or Joel? Explain how to answer this question without doing calculations
Joel because the slope is steeper
Calculate the speed of each runner from the graph in Figure 4.15.
Joel- 8.8 m/s robin- 6.6 m/s
constant speed
speed that stays the same and does not change
slope
the ratio of the rise (vertical change) to the run (horizontal change) of a line on a graph
What does the slope of the line on a position vs. time graph tell you about an object's speed?
the slope is the speed
Explain why time is an independent variable and position is a dependent variable in a position versus time graph
time is changing, position is affected by time
On a graph of position vs. time, what do the x-values represent? What do the y -values represent?
x-time, independent variable y-position, dependent variable