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Newton's Second Law of Motion - unbalanced Forces.
Forces which act along a straight line
can be added if the forces are in the same
direction,
or subtracted if the forces are in the opposite direction.
In the above example, the
forces can be added
producing an unbalanced force of 10 N
pointing to the left.
Newton's Second Law says that
if the forces on an object are unbalanced
then its motion will change.
The bigger the force, the bigger the
change in motion.
A change in motion is called acceleration.
Newton's Second Law gives rise to the equation
F =
m x a
(Force = mass x acceleration).
This equation is important! (continued on the next page).
Headings Forces and
Motion Search Questions 
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