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    Physics
    Grade-9
    Easy

    Question

    Which of the following is incorrectly matched?

    1. The motion of the Earth around the Sun– periodic motion.
    2. Strings of a guitar – vibrational motion.
    3. Blades of a food processor – vibratory motion.
    4. 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

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      A body is in uniform motion. On which type of path should it travel so that its motion can be called periodic motion?

      1. Straight path
      2. Circular path
      3. Curved path
      4. 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?

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      Match the following.
      a. Vibratory motion
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      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.

      1. a - 3, b - 1, c - 2
      2. a - 1, b - 3, c - 2
      3. a - 3, b - 2, c - 1
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      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.
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      The _______ of a ________ motion is the small interval of time after which the motion is repeated.

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      The _______ of a ________ motion is the small interval of time after which the motion is repeated.

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      Human heart breathing is an example of:

      1. Uniform motion
      2. Circular motion
      3. Periodic motion
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      Human heart breathing is an example of:

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      How can you describe a periodic motion?

      1. Motion that repeats itself at irregular intervals of time.
      2. Motion in which object comes to mean position at random intervals of time.
      3. Motion that repeats itself at regular intervals of time.
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      The human heartbeat is an example of which type of motion?

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      Which type of motion is represented by the plastic ruler shown below?

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      Which type of motion is represented by the plastic ruler shown below?

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      Read the following statements and choose the correct option:
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      Select the one that is an example of periodic motion:

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      2. March past of soldiers.
      3. A bird flying in the air.
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      Select the one that is an example of periodic motion:

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      3. A bird flying in the air.
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      Which of the following is incorrectly matched?

      1. Simple pendulum – periodic motion.
      2. Strings of a guitar – rectilinear motion.
      3. Blades of a food processor – circular motion.
      4. Falling of a stone – rectilinear motion.

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      2. Strings of a guitar – rectilinear motion.
      3. Blades of a food processor – circular motion.
      4. Falling of a stone – rectilinear motion.
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      3. Largest, repeated
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      Which letter among the following represents the mean position of the pendulum?

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      Which letter among the following represents the mean position of the pendulum?

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      2. B
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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?

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      3. Bob, pendulum, speed
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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?

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      2. Bob, pendulum, oscillation
      3. Bob, pendulum, speed
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      The motion that repeats itself at regular intervals of time is:

      1. Non-uniform motion
      2. Circular motion
      3. Periodic motion
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      The motion that repeats itself at regular intervals of time is:

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      2. Circular motion
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