Difference between revisions of "Newton's First Law"
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==Key Stage 4== | ==Key Stage 4== | ||
===Meaning=== | ===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 Forces|unbalanced force]] acts upon it." | + | '''Newton's First Law''' states that "An [[object]] in motion will tend to stay in motion in a straight line and an [[object]] at rest will tend to stay at rest unless an [[Unbalanced Forces|unbalanced force]] acts upon it." |
===About Newton's First Law=== | ===About Newton's First Law=== | ||
Revision as of 13:51, 14 February 2019
Key Stage 4
Meaning
Newton's First Law states that "An object in motion will tend to stay in motion in a straight line 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.