An object at rest will remain at rest, and an object in motion will remain in motion at a constant velocity, unless acted upon by an unbalanced force.
Here's a breakdown:
* Forces can be balanced: While a body at rest might experience individual forces like gravity, normal force, or friction, these forces are perfectly balanced. They act in opposite directions with equal magnitudes, canceling each other out.
* Unbalanced force causes motion: If an unbalanced force acts on the body, it will start moving. This unbalanced force is the net force, which is the sum of all the forces acting on the body.
Example:
Imagine a book sitting on a table.
* Gravity: The Earth pulls the book down with a force of gravity.
* Normal force: The table pushes the book up with an equal and opposite force.
These forces are balanced, resulting in a net force of zero, and the book remains at rest.
Key takeaway: A body at rest is not necessarily free from forces, but the forces acting on it are balanced, leading to a net force of zero.
