Physics
Grade-9
Easy
Question
Which of the following is incorrectly matched?
- The motion of the Earth around the Sun– periodic motion.
- Strings of a guitar – vibrational motion.
- Blades of a food processor – vibratory motion.
- An athlete running on a straight track– rectilinear motion.
Hint:
When a body moves to and fro about its mean position is called vibratory motion.
The correct answer is: Strings of a guitar – vibrational motion.
When a body moves to and fro about its mean position is called vibratory motion. Vibratory motion can be described as any object moving/swinging back and forth, moving up and down, pulsating, etc. Pendulums, swings, tuning forks, etc are examples of vibratory motion.
blades of a food processor.is Rotatory motion.
Related Questions to study
Physics
A body is in uniform motion. On which type of path should it travel so that its motion can be called periodic motion?
- Straight path
- Circular path
- Curved path
- All of these
A body is in uniform motion. On which type of path should it travel so that its motion can be called periodic motion?
PhysicsGrade-9
- Straight path
- Circular path
- Curved path
- All of these
Physics
Match the following.
a. Vibratory motion |
1. It is a kind of repetitive motion that repeats itself after a fixed interval (or regular intervals) of time. |
b. Periodic motion |
2. It is a kind of motion in which a body covers equal distances in equal intervals of time along the same straight line. |
c. Uniform motion |
3. It is a kind of oscillatory motion in which the moving object undergoes a change in shape or size. |
- a - 3, b - 1, c - 2
- a - 1, b - 3, c - 2
- a - 3, b - 2, c - 1
- a - 2, b - 1, c - 3
Match the following.
a. Vibratory motion |
1. It is a kind of repetitive motion that repeats itself after a fixed interval (or regular intervals) of time. |
b. Periodic motion |
2. It is a kind of motion in which a body covers equal distances in equal intervals of time along the same straight line. |
c. Uniform motion |
3. It is a kind of oscillatory motion in which the moving object undergoes a change in shape or size. |
PhysicsGrade-9
- a - 3, b - 1, c - 2
- a - 1, b - 3, c - 2
- a - 3, b - 2, c - 1
- a - 2, b - 1, c - 3
Physics
The _______ of a ________ motion is the small interval of time after which the motion is repeated.
- Time, oscillatory
- Periodic, periodic
- Time, rectilinear
- Period, rectilinear
The _______ of a ________ motion is the small interval of time after which the motion is repeated.
PhysicsGrade-9
- Time, oscillatory
- Periodic, periodic
- Time, rectilinear
- Period, rectilinear
Physics
Human heart breathing is an example of:
- Uniform motion
- Circular motion
- Periodic motion
- Non-uniform motion
Human heart breathing is an example of:
PhysicsGrade-9
- Uniform motion
- Circular motion
- Periodic motion
- Non-uniform motion
Physics
How can you describe a periodic motion?
- Motion that repeats itself at irregular intervals of time.
- Motion in which object comes to mean position at random intervals of time.
- Motion that repeats itself at regular intervals of time.
- Motion that does not repeat itself at regular intervals of time.
How can you describe a periodic motion?
PhysicsGrade-9
- Motion that repeats itself at irregular intervals of time.
- Motion in which object comes to mean position at random intervals of time.
- Motion that repeats itself at regular intervals of time.
- Motion that does not repeat itself at regular intervals of time.
Physics
The human heartbeat is an example of which type of motion?
- Circular motion
- Random motion
- Periodic motion
- Translatory motion
The human heartbeat is an example of which type of motion?
PhysicsGrade-9
- Circular motion
- Random motion
- Periodic motion
- Translatory motion
Physics
Which type of motion is represented by the plastic ruler shown below?

- Circular
- Translatory
- Rotatory
- Vibratory
Which type of motion is represented by the plastic ruler shown below?

PhysicsGrade-9
- Circular
- Translatory
- Rotatory
- Vibratory
Physics
Read the following statements and choose the correct option:
Assertion: All oscillatory motions are necessarily periodic motions, but all periodic motions are not oscillatory.
Reason: Simple pendulum is an example of oscillatory motion.
- The assertion is wrong, but the reason is right.
- The assertion and the reason are right, and the reason is the correct explanation of the assertion.
- The assertion and the reason both are wrong.
- Both assertion and reason are right, but the reason is not the correct explanation of the assertion.
Read the following statements and choose the correct option:
Assertion: All oscillatory motions are necessarily periodic motions, but all periodic motions are not oscillatory.
Reason: Simple pendulum is an example of oscillatory motion.
PhysicsGrade-9
- The assertion is wrong, but the reason is right.
- The assertion and the reason are right, and the reason is the correct explanation of the assertion.
- The assertion and the reason both are wrong.
- Both assertion and reason are right, but the reason is not the correct explanation of the assertion.
Physics
Select the one that is an example of periodic motion:
- A car taking a turn on a curved road.
- March past of soldiers.
- A bird flying in the air.
- A lift moving down.
Select the one that is an example of periodic motion:
PhysicsGrade-9
- A car taking a turn on a curved road.
- March past of soldiers.
- A bird flying in the air.
- A lift moving down.
Physics
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.
Which of the following is incorrectly matched?
PhysicsGrade-9
- Simple pendulum – periodic motion.
- Strings of a guitar – rectilinear motion.
- Blades of a food processor – circular motion.
- Falling of a stone – rectilinear motion.
Physics
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
Physics
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:
PhysicsGrade-9
- Uniform motion
- Circular motion
- Periodic motion
- Non-uniform motion
Physics
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
Physics
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
- String, pendulum, time period
Physics
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
- Rectilinear motion