JEE Main & Advanced Mathematics Statistics Introduction

Introduction

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Statics is that branch of mechanics which deals with the study of the system of forces in equilibrium.

Matter : Matter is anything which can be perceived by our senses of which can exert, or be acted on, by forces.

Force : Force is anything which changes, or tends to change, the state of rest, or uniform motion, of a body. To specify a force completely four things are necessary they are magnitude, direction, sense and point of application. Force is a vector quantity.

Weight: Weight of a body is the force with which it is attracted towards the centre of the earth. If \[m\] is the mass of the body and \[g,\] the acceleration due to gravity, then its weight \[W=mg\].

Tension and thurst : Whenever a string is used to support a weight or drag a body, there is a force of pull along the string. This force is called tension. Similarly, if some rod be compressed, a force will be exerted. This type of force is called thurst.

Action and reaction : Whenever one body is in contact with another body, there act equal and opposite forces at the point of contact. Such forces are called action and reaction