Ivy Mae Casas





The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. For example, "5 metres per second" is a scalar, whereas "5 metres per second east" is a vector. To have a constant velocity, an object must have a constant speed in a constant direction. For example, a car moving at a constant 20 kilometres per hour in a circular path has a constant speed, but does not have a constant velocity because its direction changes.