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Vectors

Quantities that have both magnitude and direction.

Significant Figures

Digits in a number that are considered to be important in reporting measurements.

Displacement

The vector quantity that represents the change in position of an object.

Velocity

The rate of change of displacement with respect to time, which includes direction.

Acceleration

The rate of change of velocity with respect to time.

Instantaneous Velocity

The velocity of an object at a specific moment in time.

Force Sensor

A device that measures the amount of force applied to it.

Uniform Circular Motion

Motion of an object moving at a constant speed in a circular path.

Massless Pulley

A pulley that is assumed to have no mass and does not affect the tension in the string.

Newton’s First Law

An object at rest will stay at rest, and an object in motion will stay in motion unless acted upon by a net external force.

Newton’s Second Law

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

Resultant Vector

The vector that results from adding two or more vectors together.

Kinematics

The branch of mechanics that deals with the motion of objects without considering the forces that cause the motion.

Position-Time Graphs

Graphs that represent how the position of an object changes over time.

Components of a Vector

The representation of a vector in terms of its horizontal and vertical components.

Geostationary Orbit

An orbit that allows a satellite to remain above the same point on the Earth's surface.

Projectile Motion

The motion of an object thrown into the air with an initial velocity, subject only to the forces of gravity and air resistance.