PhysicsKund Physics class 9 to 12 NCERT, JEE - NEET

NCERT CLASS 9 SCIENCE CHAPTER 7 MOTION COMPLETE SOLUTION - Phyaicskund Class 9 Science Chapter 7 motion Page number 74 Question 1 to 3 Solution with video Explanation : Question 1. An object has moved through a distance. Can it have zero displacement? If yes, support your answer with an example. Solution : Yes, An object instead of moving through a distance can have zero displacement. Example: If an object travels from point A and reaches to the same point A, then its displacement is zero. Total Distance = 4 + 4 = 8 m Distance = Final Position - Initial Position                 = 0-0 = 0 m Question 2. A farmer moves along the boundary of a square field of side 10 m in 40 s. What will be the magnitude of displacement of the farmer at the end of 2 minutes 20 seconds from his initial position? Solution : Given Side of square field = 10m So, Perimeter of a square = 4 × side = 4×10 m = 40 m Farmer takes 4...

Notes for Class 9 Science Chapter 7 Motion is prepared and uploaded for reference by academic team of expert members . Get Notes of all chapters of NCERT class 9 Science Definition of Reference Point or Origin :  A reference point is a point that is used to determine the position , speed or direction of an object that is in motion. Example :  1. A tree on the side of the road that helps a driver understand how fast they are going. 2. A landmark on a map that helps a hiker understand their location. 3. A stationary car that helps a pedestrian understand how fast they are walking. My school is located at distance of 10 km north of my house . Here , House is the reference point is used for describing where is my house located. Definition of Motion or Rest with Example - When the position of an object doesn't change with respect to reference point and time then object is said to be at rest. When the position of an object change with respect to reference point and time then object...