Frame Of Rererence

A system of objects are not moving with respect to one another.

Relative Motion

Movement in relation to a frame of reference.

Distance

The length of the path between two points.

Vector

A quantity that has magnitude and direction.

Resultant Vector

The vector sum of two or more vectors.

Speed

The ratio of the distance an object moves to the amount of time the object moves.

Average Speed

The total distance traveled divided by time.

Instantaneous Speed

The rate at which an object is moving at a given moment in time.

Velocity

The speed and direction a object is moving; Measured relative to a reference point.

Acceleration

The rate at which velocity changes.

Free Fall

The movement of an object toward earth because of gravity.

Constant Acceleration

A steady change in velocity.

Linear Graph

A graph in which the displayed data form a straight line..

Non Linear Graph

A graph in which the displayed data form a cuved line.

Force

A push or a pull that acts on an object.

Newton

The SI unit for force, equal to the force that causes a 1-kilogrram mass to accelerate at a rate of 1 meter per second squared(1n=1kg*m/s2).

Net Force

The overall forces acting on an object after all the forces are combined.

Friction

A force that opposes the motion of objects that touch as they move past each other.

Static Friction

A friction force that acts on objects that are not moving.

Sliding Friction

A Friction force that opposes the motion of an object as it slikes over a surface.

Rolling Friction

A friction force that acts on rolling objects, caused by the change in shape at the point of rolling contact.

Fluid Friction

A friction force that opposes the motion of an object through a fluid.

Air Resistance

Fluid friction acting on an object moving through the air.

Gravity

The attraction between any two objects because of their masses.

Therminal Velocity

The constant velocity of a falling object when the force of air resistance equals the force of gravity.

Projectile Motion

The path of an object in free fall after it is given an initial foward velocity.

Inertia

The tendency of an object to resist a change in its motion.

Mass

The amount of matter in an object.

Weight

The force of gravit acting on an object.

Momentum

The product of an objects mass and its velocity.

Law Of Conservation Of Momentum

Law stating that the total momentum of a system does not change is no net force acts on the system.

Pressure

The result of a force distributed over an area.

Pascal

The si unit of pressuure, epual to 1 newton per square meter..

Fluid

A substance or mixture that flows and has no shape of its own.

Hydraulic System

A device that uses a pressurized fluid acting on pistons of differnt sizes to increase force..

Lift

An upward force due to a pressure difference between the top and bottom of a wing.

Buoyancy

The ability of a fluid to exert an object in a fluid.

Buoyant Force

An upward force acting on an object in a jluid.

Archimede's Principle

The equivalence of the buoyant force on an object and the weight of the fluid displaced by the object.