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Lesson 11 exercise G, , Ql., , Ans. Traditional methods of measurement are not reliable because they are not standard and, are inaccurate. Also the measurement vary from person to person., , Q2., Ans. i. Measuring milk, ii. Measuring time in a watch iii. Measuring temperature of a person, iv., Measuring weight of a person, v. measuring a piece of cloths., , , , Q3., , Ans. The different types of motion are, i. Translational Motion- E.g. motion of a car on a straight road and motion of a stone falling, down., , Rotational Motion—E.g. Rotation of the Earth about its axis and spinning of top., , Periodic Motion— E.g. motion of the moon around the earth and revolution of the earth, around the sun.