According to the problem-solving procedure for one-dimensional kinematics, what should be done last?
ASubstitute the known values into the equation
BIdentify exactly which unknowns must be found
CCheck whether the answer is reasonable
DFind an equation that suits the knowns
Answer & Solution
Correct answer: C. Check whether the answer is reasonable
1. The procedure begins by identifying the physical principles involved and sketching the situation.
2. The knowns are listed next, then the unknowns, then a suitable equation is chosen.
3. The knowns and their units are then substituted to obtain a numerical answer.
4. The last step is to check whether the answer is reasonable in magnitude, sign and units.
_Source: OpenStax College Physics (CC BY 4.0), Ch 2 "Kinematics", section 2.6 Problem-Solving Basics for One-Dimensional Kinematics_
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