Newton's Laws of Motion

Motion

A change in the position of an object over time

Force

Push and pull required to change an object’s motion

Types of Forces

Contact and Field Forces

Contact Forces

• Forces that happen only when two objects are physically touching

• Ex. Friction, tension, weight

Field Forces

• Forces that act even when objects are not touching

• Gravity, electric, applied

First law of motion

Law of Inertia

Law of Inertia

States that an object at rest stays at rest, and an object in motion will continue in motion with the same speed and in the same direction, unless acted upon by an unbalanced force.

Inertia

• Tendency of an object to resist changes in its states of motion

• More mass = more inertia

Second law of motion

Law of Acceleration

Law of Acceleration

• The acceleration of an object is directly proportional to the net force acting on the object

• Inversely proportional to its mass

• The greater the force applied = the greater its acceleration will be

• The heavier the object = the slower the object will be

Balance Force

Net force = zero (0)

Unbalanced Force

Net force = greater than zero (>0)

Third law of motion

Law of Action-Reaction

Law of Action-Reaction

States that for every action, there is an equal and opposite reaction