Chapter 1.1, Problem 1gT

Each person in your group should obtain a ruler and at least one ticker tape segment from the staff. All the tape segments were generated using the same ticker timer. Do not write on or fold the tapes. If a ticker timer is available, examine it so that you are familiar with how it works.

G. A model train moving with constant velocity travels 60 cm for every 1.5 s that elapses.

Answer the questions below and discuss your reasoning with your partners.

1. Is there a name that is commonly given to the quantity represented by the number 40?
$\left(\text{40 = 60/1 }\text{.5}\right)$ If so, what is the name?

To denote the quantity completely, what additional information must be given besides a number 40?
How would you interpret the number 40 in this instance? (Note: A name is not an interpretation. Your response should be in terms of centimeters and seconds.)

Use your interpretation (not algebra) to find the distance the train moves in 2.5 s.

2. Is there a name that is commonly given to the quantity represented by the number 0.025?
$\left(\text{0}\text{.025 = 1}\text{.5/60}\right)$ If so, what is the name?

How would you interpret the number 0.025?

Use your interpretation (not algebra) to find the time it takes the train to move 90 cm.