Chapter 10: Motion and Measurement of Distances

Q17Written answer

While travelling in a train, it appears that the trees near the track are moving whereas co-passengers appear to be stationary. Explain the reason.

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Ans: The trees near the track appear to be moving in direction opposite to us because the position of these trees keeps changing with respect to us. Whereas, the position of our co-passengers doesn’t changes with respect to us and that is why they seem to be stationary.

Q18Written answer

How are the motions of a wheel of a moving bicycle and a mark on the blade of a moving electric fan different? Explain.

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Ans: When the wheels of a bicycle start rotating, the bicycle moves forward (unless we apply breaks). So we can see both circular and rectilinear motion in the wheels of a bicycle. On the other hand, only circular motion can be seen when fan blades are in motion as the movement of blades doesn’t changes the position of the fan.

Q19Written answer

Three students measured the length of a corridor and reported their measurements. The values of their measurements were different. What could be the reason for difference in their measurements? (Mention any three)

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Ans: Reasons for difference in their measurements could be-

1. Non standardized instrument.

2. Wrong method of measurement.

3. Use of different scales or devices.

Q20Written answer

Boojho was riding in his bicycle along a straight road. He classified the motion of various parts of the bicycle as

i. Rectilinear motion

ii. Circular motion and

iii. Both rectilinear as well as circular motion.

Can you list one part of the bicycle for each type of motion? Support your answer with reason.

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Ans:

S. No.	Type of motion	Part of bicycle	Reason
i.	Rectilinear	Handles	Rectilinear motion is observed during the movement of handles.
ii.	Circular	Pedals	The pedals cannot move in any other direction except circular because they are fixed to a chain.
iii.	Both rectilinear and circular	Wheels	When the wheel rotates the bicycle moves forward too. So, rectilinear and circular motions are both shown in the wheels of a moving bicycle.

Motion and Measurement of Distances – Class 6, Science, Chapter 10 (CBSE)

In this chapter, students will learn about motion and ways to measure distances using different formulas. Measurements, SI units of measurement, concepts related to motions will be discussed in this chapter. Motion in a straight line, circular and rectilinear motion, and periodic motion will be learned by the students. This will be an introduction to all the important concepts of physics which will be helpful for students in their higher classes.

The NCERT Exemplar provided by Vedantu will be beneficial for students as it has all the necessary notes, revision notes, solved questions, and explanations. This will help students in their studies who can use it as a reference and for revision before their examinations. Students can download the files which are as PDF from the Vedantu platforms (app and website) and start learning. In addition, if there are any doubts and students need help with something then they may take the help of the Vedantu subject experts who will be a great guide in clearing doubts as well as for making concepts more clear.

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