Constant acceleration equations
In physics numerous situations occur which involve constant acceleration. The equations which relate the initial velocity, position and time to the current velocity, position and time are called the constant acceleration equations. They are listed below: In words, the first equation states that the velocity at time t is equal to the starting velocity plus the acceleration multiplied with the time.

The second formula states that the position of an object equals the starting position, plus the starting velocity multiplied with the time, plus the half of the constant acceleration multiplied with the time squared.

In the last equation it is stated that the velocity squared equals the initial velocity squared plus two times the constant acceleration multiplied with the difference between the current position and the initial position.

Always keep in mind that the equations on this page are constant acceleration equations. The formulas can not be used in situations where the acceleration is not constant over time.

In situations with vertical linear motion of objects the acceleration, or deceleration, is mostly caused by gravity. In that case the constant acceleration term in the equations equals minus the gravitational acceleration constant, assuming the positive direction upwards.