# NCERT Exemplar Class 11 Physics Chapter 4 Solutions: Motion in a Plane

NCERT Exemplar Solutions for Class 11 Physics Chapter 4 introduces you to the motion in two dimensions. The other main topics of the chapter of NCERT Exemplar Class 11 Physics include scalar and vector quantities, properties of scalar product, Lami’s Theorem, parallelogram law of vector addition, polygon law of vector addition, triangle law of vector addition, multiplication of vectors, projectile motion, and more.

Chapter 4 – Motion in a Plane has 5 main exercises with around 37 exemplar problems in total. Solving the questions, you will come to know that to study the motion of an object in two-dimensions, you must be familiar with vectors. Since the solutions provided by our experts at Instasolv are concept-focused rather than question-focused, they can also be used to study the significant concepts covered in the chapter.

Following our NCERT Exemplar Problems Class 11 Physics Solutions, you will get the step-by-step methods offered to solve numerical value problems and all other numerical questions of the same type. So, if you feel stuck while preparing for Chapter 4 – Motion in a Plane, then refer to our exemplar problems with solutions at any time and from anywhere. Also, you can access all these solutions for free.

## Important Topics for NCERT Physics Exemplar Solutions Class 11 Chapter 4 – Motion in a Plane

**What is Motion in a Plane?**

Motion in a plane is referred to as the motion in two dimensions. For example, circular motion, projectile motion, and so on. The situation to analyze a two-dimensional motion will be the source with two coordinate axes including X-axis and Y-axis.

**What is Scalar Quantities?**

Scalar quantities are those physical qualities that can be stated entirely by their size alone. NCERT Examples of scalar quantities include density, speed, mass, temperature, length, work, etc.

**What is Vector Quantities?**

Vector quantities are stated by both direction and magnitude. The examples of vector quantities include displacement, momentum, acceleration, velocity, torque, force, etc. The direction of any vector quantity is defined by a unit vector. Vectors lying in the same or parallel to the same plane are known as coplanar vectors.

**What is the Example of Motion in a Plane?**

Projectile motion is one of the most useful examples of motion in a plane. When a thing moves in a circular path at a continuous speed, then the thing is considered to be in a uniform circular motion.

**Time Period**

The time period of uniform circular motion is referred to as the time taken by an entity to complete one complete revolution in its circular path. To preserve an entity in its uniform circular motion a radially inward acceleration must be kept constant, it is termed as centripetal acceleration.

### Exercise-wise Discussion of NCERT Physics Exemplar Solutions Class 11 Chapter 4 – Motion in a Plane

**Exercise 4.1 – Multiple Choice Question I**

This is the first exercise of NCERT Exemplar Class 11 Physics Solutions for Chapter 4. It contains 10 multiple-choice questions. Practising these questions will help you clear your concepts on the motion in two dimensions.

**Exercise 4.2 – Multiple Choice Question II**

Exercise 4.2 of Chapter 4 is considered a very important exercise from the entrance exam point of view. It contains a total of 5 multiple-choice questions. Solving the questions of this exercise will help you understand how clear your concepts are.

**Exercise 4.3 – Very Short Answer Types Questions**

There are a total of 5 questions in Exercise 4.3. In this exercise, you will find questions like fill in the blanks, state true or false, and match the following to practice.

**Exercise 4.4 – Short Answer Types Questions**

It contains 8 short answer type questions. Practising these questions will help you clear your concepts on scalar and vector quantities, properties of scalar product, Lami’s Theorem, parallelogram law of vector addition, polygon law of vector addition, and triangle law of vector addition.

**Exercise 4.5 – Long Answer Types Questions**

This exercise consists of a total of 9 questions based on the multiplication of vectors, projectile motion, and more. They are long answer type questions where you will find detailed solutions to the problems.

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