Physics
Grade-9
Easy
Question
Which of the following is incorrectly matched?
- Simple pendulum – periodic motion.
- Strings of a guitar – rectilinear motion.
- Blades of a food processor – circular motion.
- Falling of a stone – rectilinear motion.
Hint:
The string is fixed at two ends and is moving to and fro about its mean position.
The correct answer is: Strings of a guitar – rectilinear motion.
The string is fixed at two ends and is moving to and fro about its mean position. So, we can say that the motion is vibratory.
Particular components of guitar, drum and other musical instruments vibrates and produces sound.
Related Questions to study
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The period of a periodic motion is the ________ interval of time after which the motion is __________.
- Average, repeated
- Mean, not repeated
- Largest, repeated
- Smallest, repeated
The period of a periodic motion is the ________ interval of time after which the motion is __________.
PhysicsGrade-9
- Average, repeated
- Mean, not repeated
- Largest, repeated
- Smallest, repeated
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Human lungs expand and contract during breathing. The movement of the lungs during breathing is an example of:
- Uniform motion
- Circular motion
- Periodic motion
- Non-uniform motion
Human lungs expand and contract during breathing. The movement of the lungs during breathing is an example of:
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- Uniform motion
- Circular motion
- Periodic motion
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Which letter among the following represents the mean position of the pendulum?
- A
- B
- O
- All the above
Which letter among the following represents the mean position of the pendulum?
PhysicsGrade-9
- A
- B
- O
- All the above
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When ____A_____ of a ____B_____ starting from its mean position O, moves from one extreme (maximum or minimum) to another (minimum or maximum) and back, it is called a/an _____C______. What are A, B and C respectively?
- String, oscillation, vibration
- Bob, pendulum, oscillation
- Bob, pendulum, speed
- String, pendulum, time period
When ____A_____ of a ____B_____ starting from its mean position O, moves from one extreme (maximum or minimum) to another (minimum or maximum) and back, it is called a/an _____C______. What are A, B and C respectively?
PhysicsGrade-9
- String, oscillation, vibration
- Bob, pendulum, oscillation
- Bob, pendulum, speed
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The motion that repeats itself at regular intervals of time is:
- Non-uniform motion
- Circular motion
- Periodic motion
- Rectilinear motion
The motion that repeats itself at regular intervals of time is:
PhysicsGrade-9
- Non-uniform motion
- Circular motion
- Periodic motion
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Motion in a straight line is called:
- Rectilinear motion
- Periodic motion
- Rotational motion
- Circular motion
Motion in a straight line is called:
PhysicsGrade-9
- Rectilinear motion
- Periodic motion
- Rotational motion
- Circular motion
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Which of the following is not a correct example of periodic motion?
- Throwing a stone from one place to another.
- The earth rotation about its axis.
- The hands of a clock.
- The motion of a pendulum.
Which of the following is not a correct example of periodic motion?
PhysicsGrade-9
- Throwing a stone from one place to another.
- The earth rotation about its axis.
- The hands of a clock.
- The motion of a pendulum.
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Which one of the following types of motion is possessed by the needle of a sewing machine?
- Circular motion
- Rotational motion
- Periodic motion
- Both rectilinear and rotational motion
Which one of the following types of motion is possessed by the needle of a sewing machine?
PhysicsGrade-9
- Circular motion
- Rotational motion
- Periodic motion
- Both rectilinear and rotational motion
Physics
Rotational motion is not possessed by which one of the following examples?
- Elevator
- Potter's wheel
- Turning of merry-go-round
- The spinning of a tub in a washing machine
Rotational motion is not possessed by which one of the following examples?
PhysicsGrade-9
- Elevator
- Potter's wheel
- Turning of merry-go-round
- The spinning of a tub in a washing machine
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In which of the following types of motion an object moves such that distance from a fixed point remains the same?
- Translatory motion
- Rectilinear motion
- Circular motion
- Curvilinear motion
In which of the following types of motion an object moves such that distance from a fixed point remains the same?
PhysicsGrade-9
- Translatory motion
- Rectilinear motion
- Circular motion
- Curvilinear motion
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Which of the following is NOT exhibited by a rotating fan?
- Circular motion
- Rotatory motion
- Periodic motion
- Rectilinear motion
Which of the following is NOT exhibited by a rotating fan?
PhysicsGrade-9
- Circular motion
- Rotatory motion
- Periodic motion
- Rectilinear motion
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A motion in which a body moves about a fixed axis without changing its position is called:
- Rotatory motion
- Translatory motion
- Oscillatory motion
- Periodic motion
A motion in which a body moves about a fixed axis without changing its position is called:
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- Rotatory motion
- Translatory motion
- Oscillatory motion
- Periodic motion
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Which among the following shows circular motion?
- The outer part of a merry-go-round.
- The blades of a moving fan.
- The pendulum of a wall clock.
- Both [a] and [b]
Which among the following shows circular motion?
PhysicsGrade-9
- The outer part of a merry-go-round.
- The blades of a moving fan.
- The pendulum of a wall clock.
- Both [a] and [b]
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Which of the following is not an example of rotational motion?
- Movement of the moon on its axis.
- Movement of earth on its axis.
- Movement of a person on the road.
- Movement of blades of a fan.
Which of the following is not an example of rotational motion?
PhysicsGrade-9
- Movement of the moon on its axis.
- Movement of earth on its axis.
- Movement of a person on the road.
- Movement of blades of a fan.
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Which of the following does not show oscillatory motion?
- Swing
- Fan
- See-saw
- Pendulum
Which of the following does not show oscillatory motion?
PhysicsGrade-9
- Swing
- Fan
- See-saw
- Pendulum
