First law of motion
Newton’s first law of motion states that:
A body remains at rest, or in motion at a constant speed in a straight line, unless it is acted upon by a force.
What does this mean?
What this basically means is that:
- If an object isn’t moving, it won’t start moving unless a force is applied to it.
- If an object is moving, it won’t change its velocity (speed or direction), again, unless a force is applied to it.
flashcards
| Question | Answer |
|---|---|
| Newton’s first law of motion (wording) | A body remains at rest, or in motion at a constant speed in a straight line, unless it is acted upon by a force. |
| What does Newton’s first law mean for a stationary object? | If an object isn’t moving, it won’t start moving unless a force is applied to it. |
| What does Newton’s first law mean for a moving object? | If an object is moving, it won’t change its velocity (speed or direction), again, unless a force is applied to it. |