Engineering Board Exam Reviewer · Engineering Mechanics · medium
According to Newton's first law (law of inertia), a body at rest or in uniform motion will remain so unless:
- Its mass changes
- Acted upon by an unbalanced (net) external force
- It is observed by an external frame of reference
- Time passes
Answer
B. Acted upon by an unbalanced (net) external force
Solution
Newton's first law states that a body maintains its state of rest or uniform velocity unless a net external force acts on it.
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