Oscillatory motion  work sheet one  

Question one: Complete the following:

1 - The complete vibration includes ……… displacements, each is called ………

2- Frequency is measured by unit called ……… and its symbol is ……… 3- Frequency × Periodic time = ……… .

4- The maximum displacement reached by the vibrating body far from its original position is ……… .

5- The vibrational motion is done by the vibrating body at ……… of original position.

- The complete vibration is done when the vibrating body passes ……… in the same direction.

7- A Pendulum makes 30 complete vibrations in 6 seconds, its frequency = ………

8- Kilo Hertz = ……… HZ while Mega Hertz = ……… HZ.

Question two: Write the scientific term:

1- The motion done by the vibrating body at both sides of its original position. …………………………………

2-The maximum displacement reached by the vibrating body far from its original position. ……………………………………..

3- Number of complete vibrations done in one second. ………………

4- The time needed to make one complete vibration. ………………….

5- Measuring unit of frequency equals 1× 10⁹ Hertz.

 Question three: Give reasons for:

1. The frequency decreases by increasing Periodic time.

……………………………………………………………………………………………………………………

2-The vibration motion is a Periodic motion.

……………………………………………………………………………………………………………………

Question four: What is meant by?

1- Number of complete vibrations made by vibrating body in time of 10 seconds is 500. ………………………………………………………………………………………………………………………….

2-The amplitude is 6 cm.

……………………………………………………………………………………………………………………

3-Frequency of tuning fork is 600 complete vibrations / second. …………………………………………………………………………………………………………………

4-The Periodic time of simple pendulum is 0.01 second

…………………………………………………………………………………………………………………..

5- The time of 60 complete vibrations is one minute. …………………………………………………………………………………………………………………………………

Question five: Choose the correct answer:

1 - The maximum displacement reached by the vibrating body away from its original position is ……… (frequency – complete vibration – amplitude – vibrational motion)

2- One amplitude is ……… of complete vibration. (four times – equal one – quarter – half)

3- A musical instrument produces frequency of 256 Hertz, this means that the chord of instrument ……… . (has length of 265 cm – produces waves of 256 cm wave length – produces waves of velocity 256 cm/second – vibrates by 256 complete vibrations in one second)

4- A body makes 480 complete vibrations in one minute, its frequency is ……… (2 – 4 – 6 – 8)

5- If the frequency of vibrating body is 6 Hertz so it makes ……… complete vibrations in one minute. (30 – 60 – 360 – 600)

W ork sheet two The wave motion

Question one:Complete the following:

1- Waves are classified due to their ability to propagate in space into ……… and ……… .

2- The crest in ……… waves represented by ……… in longitudinal waves.

3- Radio waves are ……… waves which can propagate in space by speed ……… .

4- If the distance between the centre of third compression and center of fifth compression in longitudinal wave is 20 cm, so the wave length is ……… .

5- In transverse waves particles vibrate in ……… direction propagation direction.

6- The longitudinal wave consists of ……… and …….. .

7- Particles vibrate in the longitudinal wave in ……… direction of wave propagation.

8- The wave length of transverse wave equals the distance between ……… or ……… .

9- Radio waves are ……… waves, while the sound is ……… waves.

Question two: Write the scientific term:

1- Transverse waves can propagate in space. ……………………..

2- The maximum displacement of particles upwards …………………….

3- The maximum displacement of particles downwards……………………….

4 - The distance between two successive crests or troughs……………….

5- A disturbance in the medium where particles vibrate in perpendicular direction of wave propagation. ……………………………..

6- Disturbance in the medium where particles vibrate along the wave propagation direction. ………………………………

7- Places where particles are very close. …………………………..

8- The distance between centers of two successive compressions or rarefactions. ………………………….

Question three: Give reasons for

1- Radio waves are electromagnetic while sound waves are mechanical. ……………………………………………………………………………………………………………………………..

2- Water waves are mechanical transverse waves …………………………………………………………………………………………………………………………….…

3- We see lightning first then hearing thunder. ………………………………………………………………………………………………………………………………

Question four: What is meant by

1- Wave length of longitudinal wave is 25cm. ………………………………………………………………………………………………………………………………

2- Wave length of transverse wave is 2 meters. …………………………………………………………………………………………………………………………….

3- The light velocity is 3 × 10⁸ m/sec.

work sheet three Properties of sound waves

Question One: Complete the following:

1- Sound is produced due to ……… of objects.

2- Sound waves are ……… waves that consist of ……… and ……… .

3- Sound waves transfer as ………, it center is……… .

4 - Audible sound ranges between ……… and ……… Hz.

5- The distance travelled by sound in one second is ……… .

6- From sound properties is ……… by which we can distinguish between weak and strong sound.

7- Noise is measured by unit called ……… .

 8- The intensity of sound is ……… proportional with amplitude.