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notes class-09 Questions&Answer 02.laws of motion. 1. Explain the reasons for the following. a) When a carpet is beaten with a stick, dust comes out of it. b) Luggage kept on the roof of a bus is tied with a rope. c) A pace bowler in cricket runs in from a long distance before he bowls.. A. (a) When a carpet is beaten with a stick, the dust particles comes out of it due to static inertia. Actually on beating, the carpet moved and the dust particles still remains their position due to static inertia. So they comes out of it. (b) If the luggage kept on the roof of a bus is not tied with a rope, due to dynamic inertia they can fall down from the top of the bus when the bus stopped suddenly. So they were tied with a rope. (c) A pace bowler in cricket runs in from a long distance before he bowls, to give sufficient ...

Is matter pure Is matter pure? chapter-3 Textual Questions and Answers (click on questions to get the answers) 1. Which separation techniques will you apply for the separation of the following? (AS 1 ) a) Sodium chloride from its solution in water. b) Ammonium chloride from a mixture containing sodium chloride and ammonium chloride. c) Small pieces of metal in the engine oil of a car. d) Different pigments from an extract of flower petals. e) Butter from curd. f) Oil from water. g) Tea leaves from tea. h) Iron pins from sand. i) Wheat grains from husk. j) Fine mud particles suspended in water. Ans:- Mixture Separation techniques a) Sodium chloride from its solution in water. Evaporation b) Ammonium chloride from a mixture containing so...

9th class 1. Motion TQ chapter 1:-Motion Textual Questions motion textual questions 1. “She moves at a constant speed in a constant direction.” . Rephrase the same sentence in fewer words using concepts related to motion.(AS1) Ans:- She moves with uniform velocity. 2. In the figure given below distance vs time graphs showing motion of two cars A and B are given. Which car moves fast ? (AS1) Ans:- 1. Speed = distance/time         = slope of the graph distance, time graphs 2. Slope of distance time graphs represents speed of an object 3. Curve of car 'A' has more slope than 'B'. So, car ‘A’ moves fast. 3. Distinguish between speed and velocity. (AS1) Ans:- Speed Velocity 1. The distance travelled by the body in unit time is called spe...