Question

A runner slows down after completing a race.her deceleration is 0.25m/s2 after 5s she is travelling at 4m/s,determine her initial velocity

Answer 1

Answer:5.25 m/s

Explanation:

a = (v-u)/t

-0.25 = (4 - u)/5

-0.25*5 = 4 - u

4 - u= -1.25

u = -1*(-1.25 -4)

u = -1*-5.25

u = 5.25 m/s