Question

Which expression calculates the speed in meters per second of an object that travels a distance of 40 m every 10 s?

Answer 1

The answer would be 40/10

Answer 2

For this case we have that by definition:

$s = \frac {d} {t}$

Where,

• s: speed
• d: distance
• t: time

Therefore, we have then:

$d = 40m\\t = 10s$

Thus, replacing values we have:

$s = \frac {40} {10}$

Answer:

An expression that calculates the speed in meters per second of an object that travels to distance of 40 m every 10 s is:

$s = \frac {40} {10}$

Option C.