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Motion And Measurement Of Distances - Important Questions Model Paper In 6th Science

Published on: 31/07/2018

From the chapter Motion and Measurement, some of the important questions are covered in this question paper.
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Questions:

Generic 3

5 x 3 = 15

Explain how will you decide whether an object is in motion or at rest.

Describe in detail that how do the thickness of a thin wire can be determined.

We need standard unit of measurements for a quantity. Explain why.

Can an object be in motion and rest simultaneously for different observers? Give an example and consequence.

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

Generic 2

5 x 2 = 10

To measure chest, what type of measuring device would you use?

Mention some modes of transportation of ancient times.

State how many kilometres are there in 1 metre.

Mention the two contributions in 20th century towards transportation.

10.

Give the name of the motion possessed by the vehicles on a straight road.

Fill up / 1 Marks

5 x 1 = 5

11.

Different modes of___________________ are used to go from one place to another.

12.

The metric system for measurement was created by the_________________

13.

The SI unit of length is ______________________

14.

Motion of a wheel of a bicycle is ________________

15.

One metre is _________cm.

True or False

5 x 1 = 5

16.

The object which does not change its position time is said to be at rest.

(a)

False

(b)

True

17.

A cloth merchant uses a meter rod to measure the length of the cloth.

(a)

False

(b)

True

18.

A flying bird in the sky is at rest.

(a)

True

(b)

False

19.

An elastic tape cannot give a true measurement.

(a)

False

(b)

True

20.

Motion of earth about its own axis is rotatory.

(a)

False

(b)

True

Multiple Choice Question

5 x 1 = 5

21.

A ball rolling on the ground represents

(a)

rectilinear motion

(b)

rotational motion

(c)

Both (a) and (b)

(d)

None of the above

22.

Which of the following figure shows the correct placement of a block along a scale for measuring its length?

(a)

(b)

(c)

(d)

23.

Paheli moves on a straight road from point A to point G. She takes 20 min to cover a certain distance AB and 30 min to cover the rest of distance BG. She then turns back and takes 30 min to cover the distance GB and 20 min to cover the rest of the distance to her starting point. She makes 5 rounds on the road of the same way. Paheli concludes that her motion is

(a)

only rectilinear motion

(b)

only periodic motion

(c)

rectilinear and periodic motion

(d)

neither rectilinear nor periodic

24.

Which of the following does not express a time interval?

(a)

A day

(b)

A second

(c)

A school period

(d)

Time of the first bell in the school

25.

The distance between Delhi and Mumbai is usually expressed in the unit of

(a)

decametre

(b)

metre

(c)

centimetre

(d)

kilometre

Generic 5

2 x 5 = 10

26.

It is not accurate to measure a length with elastic tapes. Explain why.

27.

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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Answers Key:

Generic 3

5 x 3 = 15

An object is said to be at rest when it does not change its position with time.
If an object changes its position with respect to time, it is said to be in motion.

First of all, take a round pencil and try to wrap the given wire round the pencil making.
25 turns forming a coil. Now, measure the length of the wire that turns formed coil. Divide the total length of the coil by number of turns. This is the thickness of the Wire.

We need standard unit of measurements because the unit like handspan, foot, cubit differ from person to person or even indifferent countries. So, for a uniform measurement, standard unit of measurement is really required.

Yes, a person driving a car is in rest with respect to other person in car but in motion with respect to a person standing roadside. State of motion and rest depends upon observer or reference point.

Given, distance between Radha's home
and her school = 3250 m
We know that
1 km = 1000m
\(\therefore 1m ={1\over 1000}km\)
Now, the distance between Radha's home and her school in km
\( = 3250 \times {1\over 1000}={3250\over 1000}\)
= 3.25 km

Generic 2

5 x 2 = 10

We will use the measuring tape to measure chest.

In ancient times, there were some modes of transportation like bullock cart, horse cart, camel cart, etc.

There are\(1\over 1000\) kilometre in 1 metre

The two contributions in 20th century towards transportation is electric trains and supersonic aeroplanes.

10.

Rectilinear motion is the motion possessed by the vehicles on a straight road.

Fill up / 1 Marks

5 x 1 = 5

11.

()
transport

12.

()
French

13.

()
metre

14.

()
circular motion

15.

()
100

True or False

5 x 1 = 5

16.

(a)
False

17.

(a)
False

18.

(b)
False

19.

(a)
False

20.

(a)
False

Multiple Choice Question

5 x 1 = 5

21.

22.

23.

24.

(d)
Time of the first bell in the school

25.

(d)
kilometre

Generic 5

2 x 5 = 10

26.

Elastic tapes are stretchable due to which their length can be increased during the measurement if it is not handle with care. Therefore, the measurement done by elastic tapes may be greater than the actual length of the object. So, we can say that elastic tapes are not accurate to measure a length.

27.

While travelling, trees near the track same to be moving back (i.e. opposite to the direction of motion of a train) because there is a relative motion between outside trees and moving train. While in case of co-passengers, the relative motion between we and co-passengers, is zero, so it appears to be stationary.