Question

fill in the blank question
when considering how a force affects motion, identify the object(s) of interest as the
by the external world.
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Explanation:

In physics, when analyzing the effect of forces on motion, the object(s) of interest is referred to as the system. Forces acting on this system from the external world are then identified. This is a fundamental concept in understanding how forces influence the motion of an object or a group of objects.

Answer:

system; system