1
KENDRIYA VIDYALAYA SANGHATHAN
CHANDIGARH REGION
CLASS-XI
SUBJECT-PHYSICS
Chapter -3
Motion in Straight Line
, 2
INDEX
S. No. CONTENT PAGE No.
1 Gist of the chapter 3- 10
2 Expression/ Formulas used in Chapter 11
3 Multiple Choice Questions (MCQ) 12 -19
4 Assertion and Reasoning Questions 20-21
5 Case Study Based Questions 22—25
6 Answers Keys of MCQs 26-29
, 3
GIST
1.Motion:
An object is said to be in motion if it changes its position w.r.t. its surroundings with the passage
of time .e.g. A train is moving on rails
2. Rest:
If an object does not change its position with respect to its surroundings with time, then it is
called at rest.
[Rest and motion are relative states. It means an object which is at rest in one frame of reference
can be in motion in another frame of reference at the same time.]
3. Point Mass Object
An object can be considered as a point mass object, if the distance travelled by it in motion is
very large in comparison to its dimensions.
4. Types of Motion
1. One Dimensional Motion (Linear Motion or Rectilinear Motion)
If only one out of three coordinates specifying the position of the object changes with
respect to time, then the motion is called one dimensional motion
Ex. motion of a block in a straight line, motion of a train along a straight track, a man
walking on a level and narrow road and object falling under gravity etc.
2. Two-Dimensional Motion:(Motion in a Plane)
If only two out of three coordinates specifying the position of the object changes
with respect to time, then the motion is called two- dimensional motion.
A circular motion is an instance of two-dimensional motion
3. Three-Dimensional Motion:(Motion in space)
If all the three coordinates specifying the position of the object changes with respect to
time,then the motion is called three-dimensional motion.
A few instances of three dimension are flying bird, a flying kite, a flying aero plane, the random
motion of gas molecule etc.
Types of Linear Motion
The two types of linear motion can be stated as follows:
1. Uniform linear motion
2. Non-Uniform linear motion
KENDRIYA VIDYALAYA SANGHATHAN
CHANDIGARH REGION
CLASS-XI
SUBJECT-PHYSICS
Chapter -3
Motion in Straight Line
, 2
INDEX
S. No. CONTENT PAGE No.
1 Gist of the chapter 3- 10
2 Expression/ Formulas used in Chapter 11
3 Multiple Choice Questions (MCQ) 12 -19
4 Assertion and Reasoning Questions 20-21
5 Case Study Based Questions 22—25
6 Answers Keys of MCQs 26-29
, 3
GIST
1.Motion:
An object is said to be in motion if it changes its position w.r.t. its surroundings with the passage
of time .e.g. A train is moving on rails
2. Rest:
If an object does not change its position with respect to its surroundings with time, then it is
called at rest.
[Rest and motion are relative states. It means an object which is at rest in one frame of reference
can be in motion in another frame of reference at the same time.]
3. Point Mass Object
An object can be considered as a point mass object, if the distance travelled by it in motion is
very large in comparison to its dimensions.
4. Types of Motion
1. One Dimensional Motion (Linear Motion or Rectilinear Motion)
If only one out of three coordinates specifying the position of the object changes with
respect to time, then the motion is called one dimensional motion
Ex. motion of a block in a straight line, motion of a train along a straight track, a man
walking on a level and narrow road and object falling under gravity etc.
2. Two-Dimensional Motion:(Motion in a Plane)
If only two out of three coordinates specifying the position of the object changes
with respect to time, then the motion is called two- dimensional motion.
A circular motion is an instance of two-dimensional motion
3. Three-Dimensional Motion:(Motion in space)
If all the three coordinates specifying the position of the object changes with respect to
time,then the motion is called three-dimensional motion.
A few instances of three dimension are flying bird, a flying kite, a flying aero plane, the random
motion of gas molecule etc.
Types of Linear Motion
The two types of linear motion can be stated as follows:
1. Uniform linear motion
2. Non-Uniform linear motion
