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CBSE Questions for Class 6 Physics Motion And Measurement Of Earth Quiz 2 - MCQExams.com
CBSE
Class 6 Physics
Motion And Measurement Of Earth
Quiz 2
What is the type of motion of an object that moves in a straight line?
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Rectilinear motion
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Periodic motion
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Circular motion
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None of the above
Explanation
Rectilinear motion is an another name for straight line motion.
Ex. A train moving on a track.
The length of a rod is measured as $$31.52\ cm$$.
Graduations on the scale are up to :
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$$1\ mm$$
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$$0.01 \ mm$$
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$$0.1\ mm$$
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$$0.02\ cm$$
Explanation
Reading is upto $$2$$ decimal places for $$cm$$.
Hence graduation level will be upto $$2$$ places of decimal of cm and 1 place of decimal for $$mm$$.
Metre scales have bevelled edge to :
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increase the grip between scale and the measured surface
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avoid errorrs due to parallax
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look good
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None of these
Explanation
A bevelled edge or beveled edge is an edge of a structure that is not perpendicular to the faces of the piece.
Metre scales have bevelled edges to avoid errors due to parallax.
Name unit of length which is bigger than a metre?
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centimetre
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millimetre
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kilometer
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nanometre
Explanation
1 Kilometre = 1000 m
A
Standard
unit does not change with respect to space and time.
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True
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False
Explanation
The standard unit system (S.I.) is internationally accepted unit system that does not change with space and time.
hence, Given statement is true.
Which of the following shows a motion in a straight line?
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Train on a straight bridge
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Tree swaying
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Child on a merry-go-round
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None of these
Explanation
Only train on a straight bridge shows a straight line motion, rest all are not straight line motion.
Write the name of unit of length smaller than a metre?
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Kilometre
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decametre
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hectometre
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centimeter
Explanation
1m = 100 cm
The motion of an ant on a floor along the edges is an example of translatory motion.
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True
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False
Explanation
The given statement is true that the motion of an ant on the floor along the edges is an example of translatory motion because the motion of all the particles of the ant is in same direction. No, rotational motion is involved, pure transalotory motion.
The standard quantity used for comparison is called Unit.
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True
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False
Explanation
Measurement is the comparison of an unknown quantity
with some known quantity. This known fixed quantity is called a unit.
So the statement is true that the standard quantity used for comparison is called Unit.
Length of a curved line can be measured by using a :
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Ruler
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String
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Cubit
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Hand-span
Explanation
The length of curved line can be measured using a string.
The SI unit of mass is:
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Newton
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Kilogram
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Kilometer
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Gram
Explanation
Mass is the measure of the amount of matter in a body. The SI unit of mass is Kilogram $$(kg)$$.
Which of the following represents circular motion:
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Ball sliding down on an inclined plane
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Motion of a simple pendulum
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A freely falling body
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A stone tied to a thread and whirled
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None of these
Explanation
An object moving in a circular path is said to be in a circular motion. A stone tied to a thread and whirled represents circular motion, A ball sliding down an inclined plane and a freely falling body represents a linear motion, while motion of a simple pendulum is periodic but not circular. Hence, option D is correct.
Which of the following exhibits translatory motion?
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Motion of a spinning top
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Motion of a potter's wheel
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Motion of a car
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Motion of a pendulum
The SI unit of length is :
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Cubit
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Meter
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Hand-span
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Inch
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None of these
Explanation
The meter, symbol $$m$$, is the SI unit of length.
The distance between two places is 25 km. Write the magnitude of the measurement.
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km
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distance
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25
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two
Explanation
The distance between the two places is $$25$$ km where $$25$$ represents the magnitude of measurement and km represents the unit.
A to and fro motion by an object is also called
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periodic motion
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oscillatory motion
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cyclic motion
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none of these
Explanation
Periodic motion is defined as the motion which is repeated identically after a fixed interval of time , to and fro motion is not necessary here .
Oscillatory motion is that motion in which body moves to and fro about a fixed point in a fixed interval of time .
In a cyclic motion , body returns at its initial position after a time .
Instrument used to measure the temperature is
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protractor
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stethoscope
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thermometer
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none of these
Explanation
A thermometer is a device that measures the temperature of a body.
In the following questions, select the one which is different from the other three words.
(1) Ladder (2) Staircase
(3) Bridge (4) Escalator
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1
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2
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3
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4
Explanation
All are used for vertical movement except the bridge, which is used for horizontal movement.
Find the odd one out:
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gaint wheel
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Apple falling from a tree
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car moving on a straight road
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coins moving over a carrom board
Explanation
Giant wheel- Because it has rotational motion as well as translational motion.
While apple falling from a tree, a car moving on straight road and coin moving over a carrom board have only linear or rectilinear motion.
A moving vehicle on a straight road is an example of -
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raotatory motion
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vibratory motion
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periodic motion
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rectilinear motion
Explanation
rectilinear motion is motion in straight line.
rotatory motion is motion in circular path.
vibration motion is to and fro motion.
periodic motion is repeating the path again and again both rotatory and vibration motion are periodic motion also.
So moving on sraight road is motion in straight line so answer is option D.
The wall of your classroom is in a state of -
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motion
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rest
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neither rest nor motion
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none of these
Explanation
The walls are at rest with respect to the Earth. When you are sitting in the classroom, you are also at rest with respect to the Earth, and so the walls do not seem to be moving to you.
Motion of the earth around the sun is _____
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periodic
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non - periodic
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oscillatory
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linear
Explanation
Oscillatory motion takes place when the restoring force acting on the body is directly proportional to its displacement from its equilibrium position. In practice, oscillatory motion
eventually comes to rest due to damping or frictional forces.
Periodic motion, motion repeated in equal intervals of time. Periodic motion is performed.
Linear motion is motion in straight motion.
So earth repeats its path after some constant time period and not moving in straight line. Also force acting is not directly proportional to displacement for mean position. So the motion is periodic motion.
A book lying on a table is an example of:
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A body in motion
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A body at rest
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A body neither at rest nor in motion
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None of these
Explanation
When the position of a body does not change with respect to its surroundings and time the body is said to be at rest. A book lying on the table is at rest because its position with respect to other objects on the table or room is fixed.
When the position of a body changes with respect to its surroundings and time the body is said to be in motion.
State whether given statement is True or False.
The SI unit of mass is milligram.
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True
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False
Explanation
SI unit of mass is kilogram i.e. $$Kg$$.
Thus the above statement is false.
An apple falling from a tree is an example of ______ motion
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Rectilinear
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Oscillatory
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Periodic
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Rotational
Explanation
Apple falling from a tree falls under gravity. Hence according to Newton's laws of motion, the path of the object will be rectilinear or straight line path.
Electric drill, rolling ball, wheel of a moving car, pendulum of a wall clock,spinning ball. Find the odd one out.
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pendulum of a wall clock
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Electric drill
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wheel of a moving car
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spinning ball
Explanation
Pendulum of a wall clock- It is in periodic motion. Rest all are in multiple motion. The restoring force is proportional to displacement .While electric drill, rolling ball etc are in multiple motion like rotational +translational or Vibrational motion.
Find odd one out:
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a girl swinging in a swing
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falling stone
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a child sliding down a slope
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firing of a bullet from a gun
Explanation
Falling stone, sliding of child down the slope and firing of a bullet from the gun are the examples of translation motion where motion of a girl swinging in a swing is an example of oscillatory motion.
An example of curvilinear motion is -
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an apple falling from a tree
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a spinning wheel
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the motion of a pendulum
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throwing of a javelin
Explanation
Curvilinear motion is defined as a motion t
hat occurs when a particle travels along a curved path. The curved path can be in two dimensions (in a plane), or in three dimensions.
Apple will fall in a straight line so this motion is rectilinear motion.
the spinning wheel is a circular motion
pendulum will perform SHM
Javelin is thrown at some angle with horizontal so will have an acceleration at some angle with the velocity so the path followed will be curved. So-called curvilinear motion.
State whether given statement is True or False.
The motion of a giant wheel is a circular motion
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True
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False
Explanation
Giant wheel is an alternative name for a large Ferris wheel.
A Ferris wheel is a nonbuilding structure consisting of a rotating upright wheel with multiple passenger-carrying components (commonly referred to as passenger cars, cabins, tubs, capsules, gondolas, or pods) attached to the rim in such a way that all the components moves in a circle so it can be said as circular motion.
So the above statement is true.
One centimetre is equal to
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5 mm
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10 mm
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15 mm
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None of these
Explanation
We know that:
$$ 1\ cm = 10\ mm$$
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