In this body is not changing its velocity with respect to time that shows body is moving with the same velocity. Part CD gives uniform motion. When body covers equal distances in equal intervals of time, the body is said to home uniform motion. How much time will the body takes to stop? How far does the car travel in first 4 seconds? It can never be zero: it is not possible that body moves but the distance is zero, If a body travels different paths then total distance is calculated by simply adding the magnitude of all the paths, It is the shortest route travelled by body in given direction. (i) Circulatory motion/Circular motion – In a circular path.

The area enclosed under graph gives displacement, The body is moving with constant velocity. When the blades of fan rotate they rotate in circular path although they rotate with uniform speed but direction of blades continuously changes. That is earlier at rest so zero and now moving at 20m/sec so final velocity is 20 m/sec. The rate of change of velocity is called acceleration. To describe the position of an object we need a reference point or origin.

Distance-Time graphs show the change in position of an object with respect to time. We say that an object is in motion when its position changes with time.

Therefore, we can say that they are rotating with non-uniform velocity. We study so many physical quantities like distance, velocity and many more. When body covers equal distances is equal intervals of time in a straight line (given direction). In physics, we have scalar and vector quantities. Find acceleration? motion as there is continuous change velocity with time. Before studying average velocity let’s take in to account about the concept of initial and final velocities What will be the distance covered and displacement at the end of 2 minutes 30 seconds?

The physical quantities that depends upon magnitude as well as direction.

To comment about the state of any object, we have to consider a reference point or stationary object or surroundings. })(window, document); CBSE Class 10 Science Syllabus 2019-2020 Session, Matter in Our Surroundings Class 9 Science, The Fundamental Unit of Life Class 9 Science, Class 9 English Book Beehive difficult words meaning, If I were you, Class 9 CBSE English Lesson Explanation, Summary, A Slumber Did My Spirit Seal, Class 9 English Poem with Explanation, Summary, No Men Are Foreign, Class 9 CBSE English Lesson Explanation, Summary, Kathmandu, Class 9 CBSE English Lesson Explanation, Summary, Bond of love, Class 9 CBSE English Lesson Explanation, Summary, The Snake Trying, Class 9 English Poem with Explanation, Summary, Reach for the Top Part 2 Maria Sharapova, Summary, Explanation, Book Questions - Class 9 CBSE English Lesson, Reach for the Top Part 1 Santosh Yadav, Class 9 CBSE English Lesson Explanation, Summary, The Duck and the Kangaroo, Class 9 English Poem with Explanation, Summary, Packing , Class 9 CBSE English Lesson Explanation, Summary, My Childhood , Class 9 CBSE English Lesson Explanation, Summary, The Snake and the Mirror , Class 9 CBSE English Lesson Explanation, Summary, The Lake Isle of Innisfree , Class 9 English Poem with Explanation, Summary, A Legend of the Northland , Class 9 English Explanation, Summary, A truly beautiful mind , Class 9 English Explanation, summary, Question Answers, The Fun they had , Class 9 English Explanation, summary, Question Answers, The Road Not Taken , Class 9 English Explanation, Summary, The Sound of Music , Evelyn Glennie Class 9 CBSE English, The Beggar Class 9 English Lesson, Summary, Explanation, Question Answers, The Accidental Tourist Class 9 English Summary, Explanation, Question Answers, A house is not a Home Class 9 English Summary, Explanation, Question Answers, The Last Leaf Class 9 English Explanation, Summary, Question Answers, Weathering the storm in Ersama Class 9 English Explanation, Summary, Question Answers, The Lost Child Class 9 English Explanation, Summary, Question Answers, The Happy Prince , Class 9 English Explanation, summary, Question Answers, The Adventures of Toto Class 9 English Explanation, Summary, Question Answers, Class 9 English In the Kingdom of Fools, Summary, Explanation, Question Answers, Iswaran the Storyteller , Class 9 English Explanation, Summary, Questions, Class 8 Hindi Lessons Explanation, Summary, Difficult words, Class 8 Science Lessons Explanation, Summary, Difficult words, Class 10 English Lessons - Explanation, Summary, Difficult words, Class 10 Hindi Notes, Summary, Explanation, Question and Answers, Class 12 English Lessons - Explanation, Summary, Difficult words, Entrance Exams for Arts students after Graduation, List of Entrance Exams conducted by IGNOU, The moving object changes its position with time, We all when drive on road mostly the roads are straight so, that motion where we move in a straight line is called linear motion. What distance will it cover in 10seconds after the start? For this let us take different examples to understand it: Q. Your email address will not be published. For Example: Now if you travel a straight short path in a specific direction then we can say that I travelled 25km towards east.

This shows body is starting from rest & then its velocity increases at a uniform rate. It is distance travelled with respect to time in any direction. Body is moving with uniform velocity but not starting from rest . Let’s take an example suppose we are travelling to Delhi and we are covering the same distance like in each hour we cover 60 km in specified direction then the body is said to be travelling with uniform velocity. The graph involved in it is given as: When body covers unequal distance is equal intervals of time. : For uniform motion: Q. A body starts with some initial non-zero velocity at A and goes to B  with constant acceleration a. CBSE Ncert Notes for Class 9 Physics Motion. So, if body travels along a curved path.

After what time will it strike the ground? E.g: time, distance, mass, temperature, area, volume. To know more about Distance-Time Graph, visit here. You all must have played with the instrument guitar. It is denoted by “a”. Q. CBSE Class 9 Physics Motion Notes The movement of an object from one position to another position with respect to the observer is called motion. What are Joseph’s average speeds and average velocities from (a) A to B (b) A to C? When will you say that body is in uniform acceleration and non uniform acceleration? That means it has changed its position with respect to stationary object that is house. Example: A child going to school in the morning and returning home after school covers distance but displacement is zero. Ans. A stone is thrown vertically upward with a velocity of 5m/sec.