NCERT Solutions for Class 6 Science Chapter 10 : Motion and Measurement of Distances

Q:

Give two examples of periodic motion.

A:

  1. In a simple pendulum, the bob repeats its motion at a certain time interval. This motion is known as periodic motion.
  2. The motion of a swing repeats its motion at a certain time interval. Thus, a girl sitting on a swing has periodic motion.

Q:

Arrange the following lengths in their increasing magnitude: 1 metre, 1 centimetre, 1 kilometre,1 millimetre.

A:

On converting all the given measures in millimetres (mm), we get

1 cm = 10 mm

1 m = 100 cm = 1000 mm

1 km = 1000 m = 100000 cm = 1000000 mm

So, the lengths in increasing order of magnitude can be written as,

1 millimetre < 1 centimetre < 1 metre < 1 kilometre

Q:

Write the similarities and differences between the motion of a bicycle and a ceiling fan that has been switched on.

A:

Similarities: The blades of the fan and the wheels of the bicycle are attached at a fixed point. Secondly, both have circular motion about their respective fixed points.

Differences: The blades of the fan have circular motion while the bicycle has linear motion. Secondly, the motion of the blades of a fan is periodic while the motion of a bicycle is rectilinear motion.

Q:

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?

A:

Given, reading at one end = 3.0 cm

reading at the other end =  33.1 cm

The length of the knitting needle can be calculated by subtracting 33.1 cm by 3.0 cm.

length of the knitting needle = 33.1 cm – 3.0 cm = 30.1 cm

Hence, the length of the knitting needle would be 30.1 cm.

Q:

The distance between Radha’s home and her school is 3250 m. Express this distance into km.

A:

Q:

The height of a person is 1.65 m. Express this in cm and mm.

A:

Given, height of the person = 1.65 m

As, 100 cm = 1 m

So, height of the person in cm = 1.65 × 100 cm = 165 cm

Also, 1000 mm = 1 m

So, height of the person in mm = 1.65 × 1000 cm = 1650 mm

Q:

Why can a pace or a footstep not be used as a standard unit of length?

A:

The size of the foot is not same of each person. When footsteps of two people are used to measure the length, the two distances may not be equal. Therefore, footstep is not a constant quantity and cannot be used as a standard unit of length.

Q:

Why would you not like to use a measuring tape made of an elastic material like rubber to measure distance? What would be some of the problems you would meet in telling someone about a distance you measured with such a tape?

A:

An elastic measuring tape is not a suitable measuring scale because it can be stretched. In this case, the measured length would not be correct. If you measure the length of an object twice using an elastic tape, then you may get different values of the same length.

Q:

Give two examples each, of modes of transport used on land, water and air

A:

Modes of transport used on land: Cars and trains

Modes of transport used on water: Ships and boats

Modes of transport used in air: Airplanes and helicopters

Q:

Fill in the blanks: (i) One metre is ______________ cm. (ii) Five kilometre is ______________ m. (iii)Motion of a child on a swing is ______________. (iv) Motion of the needle of a sewing machine is ______________. (v) Motion of wheel of a bicycle is______________.

A:

(i) One metre is 100 cm.

     Explanation:  There  are 100 cm in 1 m.

(ii) Five kilometres is 5000 m.

      Explanation: There are 1000 m in 1 km.

        So, 5 km = 5 × 1000 m = 5000 m

(iii) Motion of a child on a swing is periodic.

       Explanation: At a certain time interval, the motion of a swing repeats itself. Hence, it is an example of periodic motion.

(iv) Motion of the needle of a sewing machine is periodic.

      Explanation: The needle of a sewing machine moves up and down frequently in a certain time interval. So, it is an example of periodic motion.

(v) Motion of the wheel of a bicycle is circular.

     Explanation: The wheel of a bicycle rotates about a fixed point as the bicycle moves. Thus, it is an example of circular motion.

Benefits of NCERT Solutions

Following are some of the benefits of using NCERT Solutions by Extramarks.

1. They are developed by our experts with the right approach for precisely answering the textbook questions.

2. They are free of cost and available online to help class 6 students.

3. They not only explain every topic but also prepare students for further examinations. 

4. They are proven to be helpful to students in their exam preparation, homework and competitive exams.

5. They will help in understanding the solutions and the methodology of writing the answers in the exams.

Tips & Strategies for Class 6 Exam Preparation

1. Make a habit of making notes for your exam preparation.

2. Study class 6 solutions from Extramarks website.

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4. While practicing, refer to NCERT Solutions for class 6 to understand step-by-step solutions to all questions.

5. Get concept clarity by tuning in to the Extramarks live classes.
6. Make time for relaxation and sleep well.

Why opt for Extramarks NCERT Class 6 Solutions?

NCERT Solutions for class 6 by Extramarks are designed by subject matter experts and provide solutions to every NCERT textbook questions. These solutions help students in their exam preparation and home assignments. Extramarks Education aims to help class 6 students understand concepts in a comprehensive way so that their base is strong for senior classes. We provide free NCERT Solutions for class 6 and all other classes.

Frequently Asked Questions

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Whenever you are stuck solving a question, have doubts or maybe want a step-by-step solution to any question from the textbook- refer to NCERT Solutions class 6 all subjects by Extramarks. It is proven for helping students learn better and improve their exams in class 6.

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NCERT Solutions for class 6 allow students to understand concepts in a simplified manner, and are an irreplaceable support to them. They not only explain every step but also prepare students for further exams. Maths of class 6 is important as a student must understand every concept if he/ she wants to learn maths in senior classes. Hence, NCERT Solutions for class 6 Mathematics is a complete study material and a must-have for every student.

Why are the NCERT solutions Important for Class 6th?

NCERT Solutions for Class 6 Science, Mathematics and other subjects are important as it is the foundation of concepts and formulas. Once you will understand the basic, you will be able to solve complex problems much easily. It also helps to solve your doubts systematically as they are self-explanatory and provide comprehensive solutions to all students.

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Yes, the Extramarks website is your one-stop solution for everything you need while studying. Not just class 6 NCERT Solutions, but we also provide solutions for all other classes. 

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