In this post, I am sharing FSC 1st Year Physics Chapter 2 Notes PDF for the students of Intermediate Part 1. This chapter’s name is Vectors and Equilibrium. Students can download 11th class chapter 2 Vector and Equilibrium Notes PDF in there laptop or mobile. These Physics Notes are for all the boards working under Punjab Board like Gujranwala Board, Lahore Board, Faisalabad Board, Multan Board, Rawalpindi Board, Sargodha Board, DG Kahn Board, and Sahiwal Board. Here are the complete FSC 1st Year Physics Notes PDF chapterwise.

**Table of Contents**show

## FSC Part 1 Physics Chapter 2 Vector and Equilibrium Notes PDF Download

### Define Vector.

A quantity having direction as well as magnitude, especially as determining the position of one point in space relative to another.

Basic concept of vectors

### Whar are Vector qualities?

There are some physical quantities, which require both magnitude and direction for their complete description. Such quantities called vectors.

Example:

Displacement, weight, velocity etc.

### Vectors representation:

There are two ways to represent a vector quantity.

i) Symbolic representation ii) Graphical representation

### Symbolic representation:

Vectors usually denoted by bold face character such as **A, d, r **and** v. **while in handwriting, we put an arrowhead over the letter .e.g. d. if we wish to refer only to the magnitude of a vector d we use lightface type such as d.

### Graphical representation:

A vector represented graphically by a directed line segment wit, an arrowhead. The length of the line segment, according to chosen scale, corresponds to the magnitude of the vector and arrowhead at one end gives the direction of the vector.

### What is Resultant vector?

The sum of two or more vectors, of same kind, is a single vector, it has the same effect as the combined effect to all the vectors, which are to be added, and is called resultant vector, usually denoted by *R*

### Define Null vector.

Null vector is a vector of a zero magnitude and arbitrary direction. For example, the sum of a vector and its negative vector is a null vector.

### What is Equal vector?

Two vector A and B are said to be equal if they have the same magnitude and direction, regardless of the position of their initial points. This mean the parallel vector of the same magnitude are equal to each other.

### Define Moment arm.

The perpendicular distance between the line of action of force and the axis of rotations called moment arm. If the line of action of the applied force passes through the pivot point then the value of moment arm is zero in this case torque is zero.

**Related links:**

FSC 1st Year Physics Chapter 1 Notes PDF