alleryA change in the state of motion needs a force that is:
AUnbalanced
BUnbounded
CUnblended
DUnblocked
Answer & Solution
Correct answer: A. Unbalanced
1. Balanced forces leave motion unchanged.
2. Something must tip the balance.
3. An unbalanced force is required.
_Source: syllabus Science, Ch 9 'Force and Laws of Motion'_
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