newton's first law

Question

A block of mass 2 kg is placed on a frictionless horizontal surface. If no external force acts on it, what can be said about its motion?

RankGuru · Accepted Answer

1. **Newton's First Law**: States that every body continues in its state of rest or of uniform motion in a straight line unless it is compelled by some external force to change that state.
2. **Analysis**: 
   - The surface is frictionless, so there is no resistive force.
   - No other external forces are applied.
3. **Result**: The net force $\sum F = 0$.
4. **Conclusion**: According to the Law of Inertia, the block will maintain its current velocity (uniform motion) forever.

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