# Chapter 10 Motion and Measurement of Distances

Chapter 10 Motion and Measurement of Distances

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

Q. – Give two examples each, of modes of transport used on land, water and air?

Cars  and Buses are the two modes of land transportation.

Cruise and boats are two types of water transportation.

Helicopters and aeroplanes are two types of air transport.

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______________.

1. 100 cm
2. 5000 m
3. Periodic motion
4. Periodic motion
5. Circular motion

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

The length of a pace or a footstep differs from one person to another. If we use the pace/footstep as the standard unit to calculate length, then two measured quantities will not be the same. That’t why we cannot use pace/footstep as a standard unit of length.

Q. – Arrange the following lengths in their increasing magnitude:

1 metre, 1 centimetre, 1 kilometre,1 millimetre.

1 millimetre > 1 centimetre > 1 metre > 1 kilometre

Q. – The height of a person is 1.65 m. Express it into cm and mm.

We know that 1 m = 100 cm ,so 1.65 m = 1.65 *100 = 165 cm

We know that 1 cm = 10 mm

So 1.65 m = 1.65 * 100 * 10 = 1650 mm

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

We know that 1km = 1000 m

3250 m = 3250/1000 km = 3.25 km

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?

The length of the needle begins at 3.0 cm

So the needle’s actual length is (33.1 – 3.0) cm = 30.1 cm.

Q. – Give two examples of periodic motion.

Two examples of periodic motion are pendulum clock motion and swing motion.

##### Motion and Measurement of distances notes Extra Question Answers

Q. -What is cubit?

A cubit as the length from the elbow to the fingertips was used in ancient Egypt.

Q. – When a metric system is created and who made it?

The metric system was developed by the French in 1790 as a standard unit of measurement.

Define:-

Rectilinear motion?

When an object moves in a straight line. This is referred to as rectilinear motion.

Periodic motion?

When an object’s motion is repeated after a period of time. This is referred to as periodic motion.

What are the things we used to measure in ancient time?

People used the length of a foot, the width of a finger, and the distance of a step as units of measurement in ancient times.

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