Suppose you increase your walking speed from 4 m/s to 14 m/s in a period of 3 s. what is your acceleration?

3.33 m/s^2

Explanation:

The definition of acceleration is the change of velocity in the time.

Since the information given does not include direction, the acceleration is calculated as tha change in speed, assuming that there is not change in direction.

So, to calculate the acceleration use the formula:

                          change in speed         Final speed - initial speed
acceleration = =
                                     time                               time

                         14 m/s - 4 m/s        10 m/s
acceleration = = = 3.33 m/s/s or 3.33 m/s^2
                                 3s                       3s

Bsame force but in the same direction