Pressure is a scalar quantity. While Force, Velocity and Acceleration are vector quantity.   Scalar quantity are quantities that are fully described by a magnitude (or numerical value) alone. Vectors quantity are quantities that are fully described by both a magnitude and a direction.Explanation: Pressure is a scalar quantity. While Force, Velocity and Acceleration are vector quantity. Scalar quantity are quantities that are fully described by a magnitude (or numerical value) alone.   Vectors quantity are quantities that are fully described by both a magnitude and a direction.