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Take a metallic tumbler and a tablespoon. Strike the tablespoon gently at the brim of the tumbler.
Hear the sound produced. Now bang the spoon on the tumbler and hear the sound produced again. Is the sound louder when the tumbler is struck hard?
Now suspend a small thermocole ball touching the rim of the tumbler. Vibrate the tumbler by striking it. See how far the ball is displaced. The displacement of the ball is a measure of the amplitude of vibration of the tumbler. Now, strike the tumbler gently and then with some force. Compare the amplitudes of vibrations of the tumbler in the two cases. In which case is the amplitude larger?
When we strike the tablespoon gently at the brim of the tumbler, it sound.
When the tumbler is struck forcefully, the sound generated is .
Now we suspend a thermocol ball touching the brim of the tumbler and hit the tumbler hard. The thermocol ball .
Now we hit the tumbler gently, this time thermocol ball gets displaced .
The displacement of the ball is a measure of the amplitude of the vibration of the tumbler. Amplitude is in the first case.
Important!
This is an activity-based exercise. Do the activity and answer questions.
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