Question

1. define oscillatory motion.
2. define frequency and its SI unit.
3. define amplitude.​

Answer 1

Explanation:

1)repeated to and fro movement of a body about a mean position is called oscillatory motion.

2)

The number of periods or cycles per second is called frequency. The SI unit for frequency is the hertz (Hz).

3)The amplitude of a sound wave can be defined as the loudness or the amount of maximum displacement of vibrating particles of the medium from their mean position

Answer 2

Explanation:

Q1) This fixed interval of time is known as time period of the periodic motion. ... Oscillatory motion is defined as the to and fro motion of the body about its fixed position. Oscillatory motion is a type of periodic motion. Examples of oscillatory motion are vibrating strings, swinging of the swing etc.

Q2) The number of periods or cycles per second is called frequency. The SI unit for frequency is the hertz (Hz). One hertz is the same as one cycle per second.

Q3) The amplitude of a periodic variable is a measure of its change in a single period. There are various definitions of amplitude, which are all functions of the magnitude of the differences between the variable's extreme values. In older texts, the phase of a period function is sometimes called the amplitude.

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