Answer:
The current speed of Sarah is 8 m/s.
Explanation:
Speed:
''It is the distance travel in per unit time". It tells the capacity of moving object how fast it is moving.
Unit:
The system international unit of speed is m/s. It can also be given in Km/h
Formula:
r = d / t
r = speed (it can also be represented by v)
t = time taken to cover the distance
d = distance
Given data:
Distance = 400 m
Time = 50 s
Speed = ?
Solution:
v = d/ t
v = 400m / 50 s
v = 8 m/s
