2. What is the acceleration of an object thrown vertically down with a speed of 10 m/s? a) 0
b) 10 m/s2
c) 15 m/s2
d) 5 m/s2
e) 20 m/s2

Explanation:

on earth, objects in free fall accelerate downward at approximately 10 m/s²

any small initial velocity is irrelevant.

truck y has a greater velocity than truck x.

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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