Forces and Motion

Newton's Second Law of Motion - Unbalanced Forces (continued).

In the example below,
the forces are unbalanced even though they are in opposite directions
because one is bigger than the other.

Unbalanced Forces

The unbalanced resultant force is 25 - 5 N  =  20 N.
This will cause a change in motion, called acceleration.

Effects of Acceleration.
If the object above is not moving,
the unbalanced force will start to move it to the left.
If it is already moving to the left,
the unbalanced force will make it move faster.
If it is already moving to the right,
the unbalanced force will make it move slower.

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