Kinetic inertia: The tendency of a moving object to always remain in motion at a uniform velocity or to maintain its constant motion is called kinetic inertia.
Acceleration: Acceleration is the rate of change of velocity of an object with respect to time.
Uniform acceleration : If the velocity of an object always increases at the same rate in a specific direction, then that acceleration is called uniform acceleration.
Velocity: Velocity is the rate of change of displacement of an object with respect to time.
Harmonic motion: If an object with periodic motion moves in a specific direction for half of the period and in the opposite direction along the same path for the remaining half of the period, then the motion of that object is called harmonic motion.