Newton’s Second Law

Acceleration

The rate at which an object’s velocity changes with time.

Air resistance

Friction that acts on something moving through air

Direct proportion

Two things that increase and decrease in the same ratio

Equilibrium

State of balance, no net change of energy

Force

Any push of pull on an object

Fluid

Anything that flows

Free fall

Motion under the influence of gravity only

Friction

Force that acts to resist the relative motion

Fluid friction

The force that opposes a motion that takes place between or within fluids

Inverse proportion

When the value of one quantity increases and the decreases by the same ratio

Kilogram

Basic unit of mass in the metric system, equal to 1000 cubic cm of water

Mass

The amount of matter in an object

Net force

Total amount of force acting on an object

Newton

Unit of measure for force

Newton’s Second Law

F=mass x acceleration

Sliding friction

Resistance created by two objects sliding against each other

Static friction

Force of friction on an object that is not moving

Terminal speed/ velocity

Maximum velocity that an object can reach as it falls through a fluid

Weight

Force acting on an object due to acceleration or gravity