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CBSE Questions for Class 6 Physics Motion And Measurement Of Earth Quiz 5 - MCQExams.com
CBSE
Class 6 Physics
Motion And Measurement Of Earth
Quiz 5
A car moving on a straight road is in
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Curvilinear motion
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Rectilinear motion
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Periodic motion
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Rotational motion
Explanation
A car is said to be in rectilinear motion if it moves on a straight road.
State whether True or False, and correct the statements if false:
(1) Metre scale is used to measure the circumference of a cylinder.
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True
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False
Explanation
$$(1)$$ This is false. Meter scale is used to measure the linear distance.(Distances measured in straight line). A metre scale can not be used to measure curved length around cylinder circumference.
Highest cost of transportation is the disadvantage of ______ mode of transportation.
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Water
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Road
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Rail
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Air
Explanation
Highest cost of transportation is the disadvantage of air mode of transportation. Air transport facilitates mobility of men and material by air. It is the fastest mode of transport. Air transport is very useful to travel long distance and it saves time as well.
Transportation through ______ is the slowest among others.
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Air
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Road
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Water
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Rail
Explanation
Water transportation
is the least expensive and
slowest
mode of freight
transport
. It is generally used to
transport
heavy products over long distances when speed is not an issue.The main advantage of
water transportation
is that it can move products all over the world.
A boy wants to buy new shoes. To find out his correct shoe size the ________ of his feet should be measured.
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Length
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Thickness
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Area
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Volume
Explanation
Shoe size basically refers to the length of shoes which go along with the length of feet that have to fit in the shoe. Thus the length of the feet should be measured as only it can help in achieving the right size.
1 N=__________.
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$$kg \times (m/s)$$
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$$g \times (km/s^2)$$
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$$1 \ kg \times (m/s^2)$$
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$$kg \times (m^2/s^2)$$
Explanation
1 N is defined as that force necessary to provide a mass of $$1 kg$$ with an acceleration of $$1 m/s^2$$
1 N =
$$1 \ kg \times 1 (m/s^2)$$
Fig. shows a measuring scale which is usually supplied with a geometry box. Which of the following distance cannot be measured with this scale by using it only once?
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$$0.1\ m$$
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$$0.15\ m$$
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$$0.2\ m$$
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$$0.05\ m$$
Explanation
The correct answer is option (c) $$0.2\ m$$.
The scale is $$0.15\ m$$ long so by using it only once, $$0.2\ m$$ cannot be measured.
Which of these is matched incorrectly?
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Rectilinear Motion: Motion of a child on a swing
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Periodic Motion: Motion of a pendulum
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Circular Motion: Person sitting in a moving Merry-Go round
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None of these
Explanation
Motion in a straight line is called rectilinear motion. For example, motion of a
vehicle on a straight road.
In circular motion an object moves such that its distance from a fixed
point remains the same. For example,
e motion of a point marked on the
blade of an electric fan or the hands of
a clock.
Motion that repeats itself after some period of time, is called periodic motion. For example, motion of a pendulum.
Which of the following figure shows the correct placement of a block along a scale for measuring its length?
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Explanation
An object should be placed on a scale such that its ends should come in between the readings marked on the scale.
Thus option C is correct.
You are provided three scales $$A, B$$ and $$C$$ as shown in Fig. to measure a length of $$10\ cm$$.
For the correct measurement of the length, you will use the scale:
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$$A$$ only
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$$B$$ only
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$$C$$ only
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Any of the three scales
Explanation
Length of 10 cm is available in all the three scales A, B, and C. So, any of the three scales can be used.
State if the following statements are true or false. Correct the statement if it is false.
In ancient times, a cubit was used to measure the mass of an object.
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True
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False
Explanation
In ancient times, a cubit was used to measure the length of an object.
A motion which repeats itself after a fixed interval of time is called periodic motion.
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True
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False
Explanation
A motion that repeats itself after a fixed interval of time is called periodic motion and the fixed interval of time is called period.
A car moving on a straight road is an example of
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rotatory motion
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rectilinear motion
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oscillatory motion
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periodic motion
Explanation
A car moving on a straight road is an example of rectilinear motion.
The magnitude of any physical quantity
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Depends on the method of measurement
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Does not depend on the method of measurement
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Is more in SI system than in CGS system
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Directly proportional to the fundamental units of mass, length
and time
Explanation
The magnitude is a absolute quantity and it does not depend on the method of measurement.
One meter has $$10$$ equal parts called
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Millimeters
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Centimeters
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Decimeters
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Nanometers
Explanation
One meter has $$10$$ equal parts called as decimeter.
Motion of wheel of a car is an example of
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Translatory motion
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Rectilinear motion
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Curvilinear motion
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Circular motion
Explanation
The wheel of a car moves in a circular path. So it will be a circular motion.
Standard (SI) Unit of length is
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$$Meter$$
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$$Centimeter$$
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$$Inches$$
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$$Kilometer$$
Explanation
The standard(SI) unit of length is $$meter$$.
Motion of a butterfly can be described as
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Periodic motion
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Circular motion
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Translatory motion
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Random motion
Explanation
The motion of a butterfly is described as a random motion as it does not move in a defined path.
Beating of a drum can be termed as which of the following type of motion ?
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Periodic motion
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Rectilinear motion
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Rotatory motion
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Circular motion
Explanation
The beating of the drum occurs at a defined period. So, it is a periodic motion.
When no force acts on a body, it must be .............
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Moving
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At rest
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In uniform motion
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Either B or C
Explanation
According to newton's law:
If an object experiences no net force, its velocity will remain constant. The object is either at rest and the velocity is zero, or it moves in a straight line with a constant speed.
Use of public transport system instead of private vehicles
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Increases pollution
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Decreases pollution
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Does not effect pollution
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None of the above
Explanation
Use of public transport system instead of private vehicles decreases pollution as it can be used by many people at the same time, hence reducing the number of vehicles on the road. It decreases fuel consumption and pollution.
Hence option B is correct.
Which of the following is the common characteristic of all moving bodies?
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They do not change their position with time.
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They change their position with time.
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They always travel with uniform speed.
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Equations of motion have to be applied to them.
Explanation
The moving bodies, i.e. the bodies in motion are called so because their position is changing with time.
The moving bodies don't need to travel with a uniform speed.
Equations of motion don't always apply to moving bodies. They are applicable only in case of uniformly accelerated motion.
So option B is the answer.
Motion along a curved line is called rectilinear motion.
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True
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False
Explanation
Motion along a curved path is called curvilinear motion and
Motion along a straight line is called rectilinear motion.
James climb on the roof of a 7 story building and drops a stone from there. What kind of motion does the stone have?
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Uniform motion
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Balance motion
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Rectilinear motion
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Non rectilinear motion
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None of these
While measuring the length of a knitting needle with a ruler, the reading of the ruler at one end is $$3.0 cm$$ and at the other end is $$33.1 cm.$$ What is the length of the needle?
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$$33.1 cm$$
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$$3.0 cm$$
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$$30.1 cm$$
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$$36.1 cm$$
Explanation
Length of the needle $$= 33.1 - 3.0$$ cm $$= 30.1$$ cm.
What is the smallest measurement unit of the length out of these?
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$$1\ Centimetre\ (cm)$$
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$$1\ Millimetre\ (mm)$$
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$$1\ Kilometre\ (km)$$
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$$1\ Metre\ (m)$$
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None of these
Explanation
We know,
$$1\ cm=0.01\ m$$
$$1\ mm=0.001\ m$$
$$1\ km=1000\ m$$
Out of these, $$1\ mm$$ is the smallest measurement unit of the length.
A ball falls down vertically. Its motion is
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periodic
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linear
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circular
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vibratory
Explanation
A ball falls down vertically. Its motion is rectilinear motion because it will fall along a straight line.
Motion is change in the _______ of an object with _______.
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Time, position
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Position, time
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Movement, position
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None of these
Explanation
Motion is defined as a change in position of an object with respect to time, thus option $$B$$ is correct.
Identify which among the following are at rest -
Fish in water
Wall
House
Table
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Fish in water, Wall, Table
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Fish in water, Wall, House
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Wall, House, Table
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Fish in water, House, Table
Explanation
Wall, House, Table are at rest because they are fixed at one place their position is not changing.
But fish in water is in motion because the water is also flowing and the fish is also moving with water so it's position is changing with time so it is said to be in motion.
How do we decide whether an object is in motion or at rest?
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If an object changes its position with time, it is in motion.
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If an object does not change its position with time, it is at rest.
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Option A and B are correct
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Option A and B are wrong
Explanation
We decide whether an object is in motion or at rest based on -
If an object changes its position with time, it is in motion.
If an object does not change its position with time, it is at rest.
Hence, option C is correct.
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