Difference between revisions of "Newton's First Law"
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: '''Newton's First Law''' describes the fact that: | : '''Newton's First Law''' describes the fact that: | ||
:: If the [[Resultant Force|resultant force]] on an [[object]] is zero then it will continue to move at a constant [[velocity]]. | :: If the [[Resultant Force|resultant force]] on an [[object]] is zero then it will continue to move at a constant [[velocity]]. | ||
| − | :: If the [[Resultant Force|resultant force]] on an [[object]] is not [[zero]] then an [[object]] will [[accelerate]] (change speed or direction). | + | :: If the [[Resultant Force|resultant force]] on an [[object]] is not [[zero]] then an [[object]] will [[accelerate]] (change [[speed]] or direction). |
: This means that if an [[object]] is [[observe]]d changing [[speed]] or direction then there must be an [[Unbalanced Forces|unbalanced force]] acting on it. | : This means that if an [[object]] is [[observe]]d changing [[speed]] or direction then there must be an [[Unbalanced Forces|unbalanced force]] acting on it. | ||
Revision as of 13:49, 14 February 2019
Key Stage 4
Meaning
Newton's First Law states that "An object in motion will tend to stay in motion and an object at rest will tend to stay at rest unless an unbalanced force acts upon it."
About Newton's First Law
- Newton's First Law describes the fact that:
- If the resultant force on an object is zero then it will continue to move at a constant velocity.
- If the resultant force on an object is not zero then an object will accelerate (change speed or direction).
- This means that if an object is observed changing speed or direction then there must be an unbalanced force acting on it.