accelerate

In mechanics, an acceleration is a change in velocity and is calculated as the rate of change of the velocity of an object with respect to time. Acceleration is apart of the study of motion and is one of several components of kinematics. Acceleration has magnitude and direction, making it a vector quantity. Fundamentally, an acceleration is any time an object changes speed or direction. The tangential acceleration of an object is the component of the acceleration which is in the same direction as the motion (or tangential velocity) of the object. When the velocity of the object does not change direction, this is called linear acceleration. Deceleration or retardation is the, on the other hand, is the component of the acceleration in the opposite (or antiparallel) direction to the tangential velocity. Radial acceleration or normal acceleration (or centripetal acceleration during circular motions) is that component of the acceleration which changes the direction of the object's velocity. In Newtonian mechanics, the acceleration of a mass arises from forces acting on it, with its net acceleration being a result of the net force acting on it. By Newton's second law, the magnitude of the net acceleration will be proportional to the magnitude of the net force acting on the object and inversely proportional to the mass of the object, while the direction of the net acceleration will be the same as the direction of the net force. The SI unit for acceleration is metre per second squared (m⋅s−2, m s 2 {\displaystyle \mathrm {\tfrac {m}{s^{2}}} } ).