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.
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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?
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 |
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. |
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. |
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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:
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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?
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:
Assertion: All oscillatory motions are necessarily periodic motions, but all periodic motions are not oscillatory.
Reason: Simple pendulum is an example of oscillatory motion.
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.
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Select the one that is an example of periodic motion:
Select the one that is an example of periodic motion:
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Which of the following is incorrectly matched?
Which of the following is incorrectly matched?
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The period of a periodic motion is the ________ interval of time after which the motion is __________.
The period of a periodic motion is the ________ interval of time after which the motion is __________.
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Human lungs expand and contract during breathing. The movement of the lungs during breathing is an example of:
Human lungs expand and contract during breathing. The movement of the lungs during breathing is an example of:
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Which letter among the following represents the mean position of the pendulum?
Which letter among the following represents the mean position of the pendulum?
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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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The motion that repeats itself at regular intervals of time is:
The motion that repeats itself at regular intervals of time is:
PhysicsGrade-9
