# Physics Revision Notes For Class 11 Chapter 3 Motion in a Straight Line

Class 11 Physics Revision Notes Chapter 3 Motion in a Straight line comprises of all the basic fundamentals of this chapter. These notes are must to have while preparing for anything related to this chapter, whether it could be an exam or casual practising. The notes of this chapter will enlighten students with the difference between displacement and distance, speed and velocity and even further, it will distinguish between variable speed and velocity etc. They will find here the definition of various terms such as instantaneous speed and velocity kinematics graphs etc.

## Frequently asked Questions on CBSE Class 11 Physics Notes Chapter 3: Motion in a Straight Line

Q1

### What are the different types of ‘Motion’?

Rotatory motion, rotatory motion, oscillatory motion, uniform circular and periodic motion, rectilinear motion, oscillatory motion and periodic motion are the types of motion.

Q2

### What is ‘Instantaneous speed’?

When the speed of an object is constantly changing, the instantaneous speed is the speed of an object at a particular moment (instant) in time.

Q3

### How does a variable speed work?

A variable speed drive is a device used in electromechanical drives to control the speed and torque of an AC motor by adjusting the motor’s input frequency and voltage.