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Science, (www.tiwariacademy.com), (Chapter - 10) (Motion and Measurement of Distances), (Class - VI), , Question 6:, The distance between Radha's home and her school is 3250 m. Express this distance into km., , €. Answer 6:, 1, , We know that 1 m = —km, 1000, , 3250, , So, 3250 m = —km = 3.25 km, 1000, , Question 7:, , While measuring the length of a knitting needle, the reading of the scale at one end is 3.0 cm and at the, other end is 33.1 cm. What is the length of the needle?, , €. Answer 7:, , The length of the needle = 33.1 cm - 3.0 cm = 30.1 cm, , Question 8:, , Write the similarities and differences between the motion of a bicycle and a ceiling fan that has been, switched on., , €. Answer 8:, , Similarity : Both show a circular motion., , Difference : Bicycle shows a rectilinear motion whereas a ceiling fan does not., , Question 9:, , Why could you not use an elastic measuring tape to measure distance? What would be some of the, problems you would meet in telling someone about a distance you measured with an elastic tape?, , €. Answer 9:, , Since the tape is stretchable, its will show the same measurements for different lenths. Therefore we, cannot use it as measuring tape. While measuring a distance, we need to tell someone how much tape, has been stretched which is difficult to measure. It leads to incorrect measurements., , Question 10:, Give two examples of periodic motion., €. Answer 10:, , Rotation of Earth, Pendulum, vibrating wire of guitar, etc., , www.tiwariacademy.com, A Free web support in Gaucation, , 2