A scalar quantity is a value that has magnitude but no direction. A vector quantity has magnitude and direction.
Scalar quantities include properties such as speed, mass, distance, work, energy, and temperature. Vector quantities include properties such as displacement, velocity, force, acceleration, and momentum.
To determine if a property represents a vector or a scalar quantity, ask yourself if you can describe the property with direction.
For instance, is it proper to say there is a mass of 50 kg west? No, that wouldn't make sense since mass is a scalar quantity.
Is it proper to say the car is moving at a velocity of 30 m/s due North? Yes, velocity is a vector quantity. We can describe how fast we're moving and what direction we are moving to.
Distance, Displacement, Average Speed, and Average Velocity:
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