kinematic equations

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Let us learn about "kinematic equations"

Introduction to Kinematics Equations

Kinematics is the branch of Physics which deals with the motion of objects. The motion of the objects can be described numerically, pictorially, graphically and also with the help of equations. Such set of equations are called Kinematics equations. They are usually set of very simple equations.

The Four Types of Kinematics Equations.

Kinematics equations are a set of four equations which can be used to the predict an unknown physical parameter in the motion of an object provided certain other physical parameters are known. Kinematics equations gives us the relation between four physical quantities which are displacement, velocity, acceleration and time. If any of these three quantities are known then using the kinematics equations we can find the fourth unknown quantity. For example if we know the initial velocity and acceleration of a moving car, then we can predict the distance travelled by the car after a particular period of time.

Derivation of the Kinematics Equations

Equation1 : Velocity - time relation v_f = v_i +at

Equation 2 : Position - average velocity relation S = (vi + vf)t / 2

Equation 3 : Position - time relation S = vi*t + 1/2at²

Equation 4 : Position - velocity relation v_f² - v_i² = 2aS

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