Physics
Grade-9
Easy
Question
The _______ of a ________ motion is the small interval of time after which the motion is repeated.
- Time, oscillatory
- Periodic, periodic
- Time, rectilinear
- Period, rectilinear
Hint:
periodic motion, in physics, motion repeated in equal intervals of time.
The correct answer is: Period, rectilinear
- Oscillatory motion is defined as the to and fro motion of the body about its fixed position. Oscillatory motion is a type of periodic motion. Examples of oscillatory motion are vibrating strings, swinging of the swing etc.
- periodic motion, in physics, motion repeated in equal intervals of time. Periodic motion is performed, for example, by a rocking chair, a bouncing ball, a vibrating tuning fork, a swing in motion, the Earth in its orbit around the Sun, and a water wave.
- The __Time,_____ of a ___oscillatory_____ motion is the small interval of time after which the motion is repeated.
Related Questions to study
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
Physics
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
Physics
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.
Physics
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