alleryBefore assigning signs to displacement and velocity, you must first specify the:
AChain of deduction
BChoice of direction
CChange of duration
DChart of distance
Answer & Solution
Correct answer: B. Choice of direction
1. In one dimension a sign carries the direction.
2. A sign is meaningless until positive is defined.
3. You should first specify this choice before assigning signs to displacement, velocity and acceleration.
4. So the answer is the choice of direction.
_Source: syllabus Physics Part I, Ch 2 'Motion in a Straight Line'_
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