SpeedSpeed is a scalar quantity.speed = distance ÷ timeDerived quantities that are based on one quantity divided by time are rates of change with respect to time and are the gradients e.g. speed is the gradient of a distance-time graph.Speed is the rate of change of distance with time.Units are ms-1
Displacement is distance in a given direction.VelocityVelocity is a vector quantity. Velocity is the rate of change of displacement with time.Velocity is speed in a particular direction.Since velocity has both magnitude(speed) and direction either can change for the velocity to change.An object travelling in a circle at constant speed is changing velocity because the direction is changing.
Displacement is distance in a given direction.VelocityVelocity is a vector quantity. Velocity is the rate of change of displacement with time.Velocity is speed in a particular direction.Since velocity has both magnitude(speed) and direction either can change for the velocity to change.An object travelling in a circle at constant speed is changing velocity because the direction is changing.