Kinematics

Kinematics - The study of motion

Dynamics - The study of forces that cause motion

Scalar Quantity - A quantity that has magnitude (size) and units but no direction

Examples: Time (S)

Mass (Kg)

Distance (m)

Temperature ( degrees C)

Vector Quantity - A quantity that has both magnitude /(size) and direction as well as units Examples: m [North]

Km/hr [East]

Distance vs Displacement

Distance is a measure of the total math covered.

Distance is a scalar quantity (only includes magnitude and units)

Displacement is a measure of how far something is from where it started and in what direction.

Displacement is a vector quantity (includes magnitude, units and direction)

Speed vs Velocity

Average speed is the total distance travelled divided by the time taken (scalar quantity)

Instantaneous speed is the speed at a particular instant

Velocity is a vector quantity and mist include both magnitude (i.e. speed) and direction

Average velocity is the displacement divided by the total time taken

Instantaneous velocity is the velocity at a particular instant