The most common type of force is the force due to gravity. It’s experienced by all of us in day to day life. When as a boy, Sir Isaac Newton wondered why an apple from the tree fell down on the ground instead of being in air or going up. He did not stop with that however went to study the reasons and started researching. Ultimately, he introduced to the entire world the concept of gravitational force of earth Universal Law of Gravitation. Newton proposed that the property of mass gives rise to universal force of attraction. it states that, “Every particle in the universe attracts every other particle with a force that’s directly proportional to the product of their masses and inversely proportional to the Square of the distance between them” F = G $frac{m_{1}m_{2}}{r^{2}}$. where, F. = force between the massesG. = gravitational constantm1. = first massm2. = second massr. = distance between the centers of the massesThe proportionality constant G is called the Universal gravitational constant, and its value in cgs unit is,G = 6 67 $times$ 10-8gm-1cm3 sec-2 This value of G was experimentally measured by Gavendish. For point masses, this force is directed along the line of centers and varies as the product of the two attracting masses divided by the square of the separate distance In formula form, we have that the force exerted on mass m1. by mass m2. has magnitude,F12 = $frac{Gm_{1} m_{2}}{r^{2}}$ The force exerted on mass 2 by mass 1, F21 is identical in magnitude as F12, however oppositely directed, i e, F21 is directed from 2 to 1. Newton’s first law of motion is described as the law of inertia. The force is described in the second law of motion given by Newton. The object will be in its position till it’s exerted by any external force. The object is in a zero acceleration state when the acted force is balanced. So there is no acceleration in equilibrium state when all the forces are balanced. The acceleration is done only on the condition of unbalanced forces, so it has changed its position, velocity, and also speed. Thus, force is the push or pull acting to change the motion of a state. which depends on the mass and acceleration of the object. A force is defined by Newton’s second law of motion. The general equation of force is represented as, F = ma. where,and;’a’ is the acceleration and ‘m’ is the mass of the object. This force is the exerted force on an object of mass m with acceleration a. Here, we discuss about centripetal and centrifugal force and net equation for different types of force like spring force and buoyant force, and Hooks law. . . . . . . . . .