Velocity is a measure of the rate of change of an object's position with respect to time. It is a vector quantity, meaning it has both magnitude (speed) and direction.
Velocity and speed are often used interchangeably, but they are actually different concepts. While speed only considers the magnitude of an object's motion, velocity also takes into account its direction.
The formula for velocity is: velocity = displacement / time, where displacement is the change in an object's position and time is the duration of the change.
Yes, velocity can be negative. This indicates that an object is moving in the opposite direction of its initial position. For example, a car moving westward with a velocity of -30 m/s is moving in the opposite direction of a car moving eastward with a velocity of 30 m/s.
The most commonly used unit for velocity is meters per second (m/s). Other units include kilometers per hour (km/h), feet per second (ft/s), and miles per hour (mph).