Question

A skier has an acceleration of −2.5 m/s2. How long does it take her to come to a complete stop from a speed of 18 m/s?

Answer 1

7.2 seconds

Step-by-step explanation:

The formula is a = v/t, or acceleration = the change in velocity over the change in time.

In this case, you do simple algebra to rearrange the formula to solve for time: t = v/a, time = velocity/acceleration.

time = 18 m/s / 2.5 m/s^2 = 7.2s

Answer 2

the answer to your question is 7.2