The cyclist moves at a speed of 18 km / h, and the speed skater 12 m / s. Who is moving faster?

In order to determine which of them is moving faster, it is necessary to bring the units of speed to a single system of units of SI, that is, kilometers per hour are converted to meters per seconds.

1 km / h = 1 * 1000/3600 m / s.

Then the cyclist’s speed:

v1 = 18 km / h = 18 * 1000/3600 = 5 m / s.

The speed of the skater is v2 = 12 v / s.

Since v2> v1 (12> 5), the skater moves faster.

Answer: The skater moves faster.