ANAND CLASSES study material and Notes explore the key differences between oscillatory and vibratory motion with definitions, examples, MCQs, conceptual questions, and quick revision notes. Perfect for JEE, NEET, and CBSE Class 11 Physics preparation.
Difference Between Oscillatory Motion and Vibratory Motion
| Feature | Oscillatory Motion | Vibratory Motion |
|---|---|---|
| Definition | Repeated to-and-fro motion of an object about a fixed point or equilibrium position. | Rapid back-and-forth motion of an object in a fixed position. |
| Direction | Motion can be linear or angular. | Motion is usually very small and rapid. |
| Path | Object moves between two extreme points around a mean position. | Object undergoes small displacements around its mean position. |
| Example | A pendulum, a swing, a mass attached to a spring. | The vibration of a guitar string, the motion of a tuning fork. |
| Speed | Can be slow or fast. | Always very fast. |
| Energy Transfer | Energy is transferred between potential and kinetic forms. | Energy is transferred as mechanical waves or sound. |
| Type of Motion | Oscillations can be slow and periodic. | Vibrations are usually rapid and may or may not be periodic. |
Key Points:
- Oscillatory motion is a broader term and includes slow or fast back-and-forth movement.
- Vibratory motion is a type of oscillatory motion but is usually much faster.
MCQs on Oscillatory and Vibratory Motion
1. Which of the following is an example of oscillatory motion?
a) A car moving on a straight road
b) A pendulum swinging back and forth
c) A rolling ball
d) A spinning fan
✔ Answer: b) A pendulum swinging back and forth
2. Vibratory motion is characterized by:
a) Slow and large movements
b) Rapid small displacements around a mean position
c) Motion in a straight line
d) Continuous circular motion
✔ Answer: b) Rapid small displacements around a mean position
3. Which of the following is NOT an example of oscillatory motion?
a) A vibrating tuning fork
b) A child on a swing
c) The motion of a seesaw
d) The motion of a car on a straight road
✔ Answer: d) The motion of a car on a straight road
4. Vibratory motion is a type of:
a) Translatory motion
b) Rotational motion
c) Oscillatory motion
d) Linear motion
✔ Answer: c) Oscillatory motion
5. What happens to energy in oscillatory motion?
a) It remains constant without change
b) It is converted between potential and kinetic energy
c) It is lost completely
d) It does not follow any pattern
✔ Answer: b) It is converted between potential and kinetic energy
Conceptual Questions with Answers
Q1. Define oscillatory motion with an example.
Ans: Oscillatory motion is the repetitive to-and-fro movement of an object about a fixed equilibrium position. Example: A pendulum moving back and forth.
Q2. What is vibratory motion? Give an example.
Ans: Vibratory motion is a type of rapid oscillatory motion in which an object moves back and forth about a fixed position. Example: The vibration of a tuning fork.
Q3. How is vibratory motion different from oscillatory motion?
Ans:
- Oscillatory Motion: Can be slow or fast, and the object moves between two extreme points (e.g., a pendulum).
- Vibratory Motion: A rapid and small back-and-forth movement (e.g., guitar string vibration).
Q4. Can oscillatory motion be periodic? Explain.
Ans: Yes, oscillatory motion is periodic if the motion repeats at regular time intervals, such as in a simple pendulum.
Q5. How does energy transfer occur in vibratory motion?
Ans: In vibratory motion, energy is transferred as mechanical waves or sound, such as when a guitar string vibrates and produces sound waves.
Quick Revision Notes
✔ Oscillatory Motion: Slow or fast to-and-fro motion (e.g., a pendulum, a swing).
✔ Vibratory Motion: A rapid back-and-forth motion (e.g., a tuning fork, guitar string).
✔ Oscillatory motion can be periodic, meaning it repeats at fixed intervals.
✔ Energy transfer in oscillations occurs between potential and kinetic energy.
✔ All vibratory motions are oscillatory, but not all oscillatory motions are vibratory.
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