Difference between revisions of "Newton's First Law"
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Stationary Object - The [[object]] remains at rest because the [[force]]s and [[Balanced Forces|balanced]]. | Stationary Object - The [[object]] remains at rest because the [[force]]s and [[Balanced Forces|balanced]]. | ||
| − | + | Uniform Velocity - The [[object]] remains at a constant [[speed]] and continues in a straight line because the [[force]]s acting on the [[object]] are [[Balanced Forces|balanced]]. | |
| − | + | Uniform Speed but Changing Velocity - The [[object]] is changing direction because there are [[Unbalanced Forces|unbalanced forces]] acting on it. | |
Changing Speed - The [[object]] is changing speed because there are [[Unbalanced Forces|unbalanced forces]] acting on it. | Changing Speed - The [[object]] is changing speed because there are [[Unbalanced Forces|unbalanced forces]] acting on it. | ||
Revision as of 14:09, 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.
Examples
Stationary Object - The object remains at rest because the forces and balanced.
Uniform Velocity - The object remains at a constant speed and continues in a straight line because the forces acting on the object are balanced.
Uniform Speed but Changing Velocity - The object is changing direction because there are unbalanced forces acting on it.
Changing Speed - The object is changing speed because there are unbalanced forces acting on it.