4. A body in motion is said to be in equilibrium when it is A moving with uniform velocity.
B at rest.
C accelerated by a force.
D moving in an indefinite path.​

A. moving with uniform velocity.

Explanation:

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A

Explanation:

Equilibrium is a state in which opposing forces or influences are balanced hence A being correct

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

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