**Motion and its Types: Basic Concept**

Motion refers to the change in position of an object with respect to its surroundings. It is a fundamental concept in physics and is studied under the branch of mechanics. In this context, we will focus specifically on motion in a straight line.

**Introduction to Motion in a Straight Line**

Motion in a straight line, also known as rectilinear motion, occurs when an object moves along a straight path. It is the simplest form of motion and is often used as a starting point to understand more complex motions. In this type of motion, the object can either be in uniform motion or non-uniform motion.

**Uniform Motion**

Uniform motion occurs when an object covers equal distances in equal intervals of time. In other words, the object moves at a constant speed. In this type of motion, the velocity remains constant and there is no change in direction. For example, if a car travels at a speed of 60 km/h for 2 hours, it covers a distance of 120 km uniformly.

**Non-Uniform Motion**

Non-uniform motion occurs when an object covers unequal distances in equal intervals of time. In this type of motion, the velocity of the object changes continuously. The object can either be accelerating or decelerating, depending on whether its velocity is increasing or decreasing. For example, if a car starts from rest and gradually increases its speed, it is undergoing non-uniform motion.

**Key Concepts in Motion**

- Displacement: Displacement refers to the change in position of an object. It is a vector quantity, meaning it has both magnitude and direction. Displacement is calculated as the difference between the final position and the initial position of the object.

- Velocity: Velocity is defined as the rate of change of displacement. It is also a vector quantity and is calculated as the displacement divided by the time taken. Velocity indicates both the speed and direction of motion.

- Speed: Speed is defined as the rate of change of distance. Unlike velocity, it is a scalar quantity, meaning it only has magnitude and no direction. Speed is calculated as the distance traveled divided by the time taken.

- Acceleration: Acceleration is the rate at which an object's velocity changes. It is calculated as the change in velocity divided by the time taken. Acceleration can be positive (when velocity is increasing) or negative (when velocity is decreasing).

**Conclusion**

Motion in a straight line is a fundamental concept in physics. It can be categorized into uniform motion and non-uniform motion. Understanding key concepts such as displacement, velocity, speed, and acceleration is crucial in analyzing and solving problems related to motion.

Motinon Is a Change in position With Respect to another with time.
It has three types
1.Linear motion
2.Rotatory Motion
3.Oscilllaitory Motion
only Linear motion have 2 type
1.Rectilinear motion
2.Curvilnear motion