Question

tom is measuring how fast his classmates can run 100 meters. he records his data below:

classmate	time (seconds)
mary	18.5
david	13.2
eliza	16.1

if tom wants to determine each classmates average speed—how many meters each covered per second—which lab tool would be most useful?
a. a meter stick
b. a stopwatch
c. a calculator
d. an anemometer

Explanation:

The average speed is calculated as distance divided by time. Here, the distance (100 meters) is already known and the time for each classmate is recorded. To calculate the speed (meters per second), a calculator is needed to perform the division operation. A meter - stick measures length, a stopwatch measures time, and an anemometer measures wind speed.

Answer:

C. a calculator