Distance from Moving Man (reference point to)| House | Wall | Tree |
| 8 m | 10 m | 8 m |
Displacement from Moving Man (reference point to)| House | Wall | Tree |
| + 8 m | +10 m | -8 m |
What is the difference between an object’s DISTANCE and its DISPLACEMENT?
The distance only has an amount and a unit, displacement also has a direction.
What is the difference between an object’s SPEED and its VELOCITY?
Speed compares the distance it traveled to the time it took to travel that distance, and velocity compares the amount that the objects displacement (direction and distance) have both changed during a certain amount of time.
A) The unit of distance in the moving man is meters
B) The unit of time used in the moving man is seconds
At which of the two velocities did he move faster? 4 meters/sec
SPEED TIME DISTANCE COVERED
TRIAL #1 1 meter/sec (slower) 2 seconds 2m
TRIAL #2 4 meter/sec (faster) 2 seconds 8m
TRIAL #1 ____2_____ meters divided by _____2_____sec = ________1_____ m/sec
TRIAL#2 ____8_____ meters divided by ____2_____sec = ________4______m/sec
1) EXPLAIN the difference in motion represented by a straight line and a curving line on a “distance vs. time” in terms of constant or changing speed.
When it is straight it is constant, when it curves it is changing.
2) Changing speed is called “acceleration” (speeding up) or deceleration (slowing down). Describe the shape of an acceleration line on a Distance vs. Time graph of acceleration.
The shape of the line has a lot of peaks. This is because it is always changing.
3) EXPLAIN the difference between the motion represented by a flat line and a sloping straight line in a “distance vs. time” graph.
A flat line means he is standing still. If it is sloping, it means he is moving forward or backward.
4) If the slope of a line on a “distance vs. time” graph is steep. What is different about the motion then when it is not steep?
If the line isn’t very steep that means he wasn't moving very fast.
A) CALCULATE the average speed/velocity between point B & Point C by finding the slope of the line between the 6th and 15th seconds (show work below)
10/-8 = 1.25 meters per second
B) Why is the line sloping upward to the right between the 2nd & 3rd second, but downward to the right between 6th and the 15th seconds?
Because he was moving away then he was moving closer.
C) During what two times did he stop moving?
Time 1: 3 seconds
Time 2: 16 seconds
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