A quantity with both magnitude and direction.
A quantity with magnitude only (no direction).
The point relative to which all measurements are taken.
A coordinate system with an origin and directions used when taking measurements.
The total path length travelled. Scalar.
The change in position of an object. A vector pointing from initial position to final position.
The rate of change of distance with respect to time. A scalar.
The rate of change of displacement with respect to time. A vector.
The location of an object using a particular frame of reference. A vector.
The speed of an object at a particular moment in time. A scalar equal to the magnitude of instantaneous velocity.
The velocity of an object at a particular moment in time. A vector.
Velocity is constant and thus not changing. Both magnitude and direction if velocity must not be changing. Acceleration is zero.
The rate of change of velocity with respect to time. A vector.
An object is moving in the positive direction and speeding up OR moving in the negative direction and slowing down.
An object is moving in the positive direction and slowing down OR moving in the negative direction and speeding up.
A word used in everyday language to mean slowing down. Not the same as negative acceleration!
The acceleration and velocity vectors are pointing in the same direction. Either they are both positive or they are both negative.
The acceleration and velocity vectors are pointing in opposite directions. One is positive and the other is negative.