Class 9 Motion Link: Watch the lecture on motion Also read NCERT text book, Link Assignment 1 Chapter : Motion 1. What is meant by the statement ‘Rest and motion are relative terms’? Give example to show it. 2. Explain whether the walls of a classroom are at rest or in motion. 3. Define scalar and vector quantities. 4. Identify the following as scalar or vector quantities:- mass, velocity, speed, length, distance, displacement, temperature, force, weight, power, work and energy. 5. The school of a boy from his home is 1 km to the east. When he reaches back home, he says that he had traveled 2 km distance but his displacement is zero. Justify your answer. 6. Under what condition, the average speed is equal to the magnitude of the average velocity. 7. Can the average speed of a movin