7. Mildred was driving 12 m/s and slowed

to 8 m/s in three seconds. Mildred's

acceleration can be calculated as:

0 0

ID 111111

0 0

1223

33

The acceleration of Mildred is, 1.33 m/s²

Explanation:

Given data,

The initial velocity of Mildred, u = 12 m/s

The final velocity of Mildred, v = 8 m/s

The time period of travel, t = 3 s

The acceleration of Mildred,

a = (v-u) / t

a = (8 - 12) / 3

= - 4/3

= - 1.33 m/s²

The negative sign indicates that the Mildred is decelerating.

Hence, the acceleration of Mildred is, 1.33 m/s²