
Force, Mass, and Acceleration
Force can be figured out if you know the mass and acceleration of an object. This equation comes from Newton's Second Law of Motion: f = m * a
Where f = force, m = mass, and a = acceleration.
Forces and Vectors Force not only has a magnitude (which is what we get in newtons when we use the equation above), but it also has a direction. This makes force a vector. Vectors are shown by an arrow that indicates the direction of the force and a number that indicates the magnitude. See the pictures to the right to see how the arrow is used to show the direction of the force. 