A speed skater is travelling at 2 m/s and accelerates uniformly to 4 m/s in 5 seconds. What is her acceleration?

The answer to your question is a = 0.4 m/s²

Explanation:

Data

speed 1 = 2 m/s

speed 2 = 4 m/s

time = 5 s

Acceleration measures the change of speed over a unit of time.

Formula

Acceleration = (speed 2 - speed 1) / time

Substitution

Acceleration = (4 - 2) / 5

Simplification

Acceleration = 2/5

Result

Acceleration = 0.4 m/s²