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GURUKUL CENTRAL ACADEMY, CH.- 11. MEASUREMENT AND, MOTION, WORKSHEET-1, A. 1. Refer to the textbook, 3. 2000 mm, , 2. stationary–in motion, 4. 5mm, 20 cm, 5m , 5 km, , WORKSHEET-2, 1. False, 2. True, 3. True 4. False, B. See Fig 11.22 in the Textbook Exercises, A., , 5. True, , TEXTBOOK EXERCISES, Page 123 Try These, 1. Centimetre, 2. Kilometre, , 3. Metre, , 4. Metre 5. Metre, , Page 129 Try These, 1. Periodic motion 2. Rotatory motion 3. Curvilinear motion, 4. Rotatory motion 5. Translatory motion 6. Rotatory motion, 7. Oscillatory motion 8. Translatory motion, 9. Rotatory and translator motion 10. Periodic motion, 11. Rotatory motion12. Circular and translatory motion
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GURUKUL CENTRAL ACADEMY, , EXERCISES, A., , 1. b. 2. a. 3. a. 4. c. 5. a. 6. c. 7. a., , B., , 1. Rectilinear, 4. Periodic, , C., , 1. True, 2. False; The standard unit of measuring mass is kilogram., 3. True, 4. True, 5. True, 6. False; The motion of planets around the sun is circular motion., 7. True, , D., , 1. 1000, 2. unit, magnitude, 3. revolution, 4. in vertical position, 5. random motion, 6. different, , E., , 1. Second, 2. Yes, 3. Circular, 4. No, 5. Vibratory motion, 6. The error arising due to incorrect reading is called parallax error., , 2. Curvilinear, 5. Oscillatory, , 3. Random, 6. Rotational
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GURUKUL CENTRAL ACADEMY, 7. When its position does not change., 8. Movement in different directions with no fixed path is called, random motion., 9. Myself, F., , 1. Unit of measurement which could be uniformly used by, everyone is called standard unit., 2., , Rest: If an object does not change its position with respect to a, fixed object, it is said to be at rest., Motion: When there is a change in the position of an object with, respect to a fixed object or point, it is said to be in motion., , 3., , Metre is the distance between two lines on a standard bar, composed of an alloy of ninety per cent platinum and ten per cent, iridium, measured at 0 C., , 4., , When a body moves along a curved path, it is said to exhibit, curvilinear motion., , 5., , The to and fro movement of a body about a fixed position is, called an oscillatory motion. Examples are the movement of a, pendulum, a swing, etc., , 6., , Motion of a car along straight road and falling of a stone from a, height., 7., , a. The scale should be placed straight along the box., b. The observer’s eye should be in vertical position.
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GURUKUL CENTRAL ACADEMY, 8. 10.1 cm., G., , 1. Appropriate unit of measurement should be used to measure, different objects. For example, it would be foolish to measure the, height of a tree in km., 2., , Refer Experiment 3 from page 125., , 3., , Refer Experiment 4 from page 125., , 4., , Translatory motion, rotational motion, circular motion, periodic, motion, non-periodic motion, oscillatory motion and random, motion are the different types of motions., When an object moves as a whole, that is, if all its parts move the, same distance in a given time, it is said to be in translatory motion., For example, when a car moves on a straight road, all its parts, move simultaneously., When a body moves about a fixed central point without changing, its position, is said to exhibit rotational motion. For example, the, turning of a merry-go-round is a rotational motion., When a body moves around a circular path in such a way that its, position keeps changing with time is said to exhibit a circular, motion. For example, the motion of the earth around the sun., , 5., , Refer text on page 124.
