1. A vector quantity is a physical quantity that has both magnitude and direction.
2. A scalar quantity has only magnitude.
3. Momentum is the product of mass and velocity (p = mv). Since velocity is a vector (having direction), momentum is also a vector quantity.
4. Pressure is force per unit area (P = F/A). Although force is a vector, pressure is defined as a scalar quantity.
5. Energy is the capacity to do work and is a scalar quantity.
6. Work is the dot product of force and displacement (W = F · d), which results in a scalar quantity.