Physics Definitions

Distance: The total movement of an object without any regard to direction. Displacement: The change in position of an object. Speed: The time rate at which an object is moving along a path. Rate: A measure over time. Acceleration: A change in speed or velocity. This change can be positive and negative. (the rate at which velocity changes) Velocity: The rate of change in displacement and direction of an object. Force: The push or pull on an object with mass that causes a change in velocity. Inertia: A property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.

• Objects continue in their state, either stationary or moving, unless a force acts on them.
• The tendency of an object to maintain its current status (usually velocity) Centre of Gravity: An imaginary point in a body of matter where it can be thought mass is concentrated.
• A balance point of an object. Stable Equilibrium: A state of equilibrium of an object where if the object were displaced it would return to its original position. Moment: A force that causes an object to turn. Gravity: A fundamental force of mutual attraction between objects with mass/energy

Vector: A strength or size of force (magnitude) that acts in a particular direction. Scalar: A magnitude without direction.

Newton's Laws:

• 1st Law (of inertia): In general, objects continue to keep on doing what they are already doing.

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