Answer:
Galileo
Explanation:
Galileo Galilei pioneered the experimental scientific method, and was the first to use a refracting telescope to make important astronomical discoveries. He is often referred to as the "father of modern astronomy" and the "father of modern physics". Albert Einstein called Galileo the "father of modern science."
If the velocity is constant then the acceleration of the object is zero.

Thus when we apply the equation

It remains

or equivalent
Answer:
Distance is 800 m and Displacement is 0 m
Explanation:
Total Distance
= 400(2)
= <u>800</u><u> </u><u>m</u>
Total Displacement
= <u>0</u><u> </u><u>m</u> since she returns to the same spot
M=meter, km=kilometer, mm=millimeter, mg=micrometer, cm=centimeter