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.

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