Chapter 23: Newton's Laws of Motion

Motion
1. Motion occurs when an object changes its
position relative to a reference point.
2. Distance is the path length an object
travels. Displacement is the distance and
direction between start and end points.
3. Speed is the distance divided by the time.
Velocity is the displacement divided by the
time. Acceleration is the change in velocity
divided by the time.
Newton’s First Law
1. A force is a push or a pull. Forces are
balanced if they cancel.
2. The first law of motion states that the
Copy and complete the following table on the laws of motion.
Laws of Motion
Statement An object will remain at
rest or in motion at constant
velocity until it is acted
upon by an unbalanced force.
motion of an object does not change unless
it is acted upon by an unbalanced force.
Newton’s Second Law
1. The second law of motion states acceleration
is in the direction of the unbalanced force
and equals the force divided by the mass.
2. Friction resists the sliding motion between
two surfaces in contact.
Newton’s Third Law
1. The third law states that forces always act in
equal but opposite pairs.
2. Action and reaction forces do not cancel
because they act on different objects.
First Law Second Law Third Law
Describes Relation motion of object
Between What? and force on object
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