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FIZIK

### Transcript of F5 C1 LATIHAN 1

WAVES - TRIAL QUESTIONS6.1 WAVES 1. The diagram shows a displacement distance graph of a transverse wave motion.

(b) Mark on the diagram (i) with a letter C which represents a point of compression. (ii) With a letter R which represents a point of rarefaction. (iii)With a letter which represents the wavelength (c) From the graph, find (i) Amplitude (ii) wavelength

(a) On the graph, label: (i) direction of the vibration of the particles medium (ii) direction of the propagation of the wave. (b) Give one example of transverse wave. (c) Find (i) Amplitude (ii) Wavelength (d) If the frequency is 25 Hz, find the wave speed.

(d) If the speed of the sound wave is 330 ms-1, find its frequency.

3. Diagram shows a simple pendulum which consists of a bob of mass 40.0 g at the end of a light inelastic string of length 20.0 cm. The pendulum makes 20 complete oscillations in 5.0 s.

2. The diagram shows a tuning fork which produced a longitudinal wave. (a) By using the letters A,B and C in the diagram above state the (i) (ii) equilibrium position the meaning of period

(a) Why does sound wave is a longitudinal wave?FIZIKMOZAC 2010

(b) What is the frequency of the oscillations of the pendulum ?

(d) What happens to the frequency of the oscillations of the pendulum when the length of the pendulum is 80.0 cm ?

(e) After a while the pendulum stops to oscillate . Explain why?

(f) Plot a graph displacement time to show why the pendulum stops to oscillate.

diagram 2.1

(g) State the form of energy when the pendulum (i) at B (ii) at C

4. Question 2: Kedah 07 Diagram 2.1 shows the initial reading of a stopwatch at the beginning of an experiment. The stopwatch was used to measure the time for 20 complete oscillations made by a simple pendulum of length, l. Diagram 2.2 shows the reading of the stopwatch at the end of the experiment.

Diagram 2.2 (a) (i) State the type of error shown in Diagram 2.1. .......................................................... [1 mark] (ii) What is the actual time taken for the pendulum to complete 20 oscillations? .......................................................... [1 mark] (b) (i) Find the period of one complete oscillation, T, for this pendulum. [1 mark]

FIZIKMOZAC 2010

(ii) The relationship between the length, l, and the period, T, of a simple pendulum is given by the g equation, l 2 T 2 . 4 Using the value of T obtained in (b)(i), calculate the length, l, of the pendulum. [Given that = 3.142 and g = 10 m s-2]

(iii) Name the wave phenomenon occurs in Diagram 7.2. ................................................ [1 mark] (b) The water waves with a wavelength of 1.5 m travels with velocity 2.0 m s-1 from the sea to the beach. The velocity of the waves when reach near the beach is 1.2 m s-1. Calculate (i) the frequency of the waves

[2 marks]

[1 marks]

6.2 6.5 REFLECTION, REFRACTION, DIFFRACTION, INTERFERENCE 5. Question 7: Melaka Mid 08 Diagram 7.2 shows a water waves propagated from the sea to the beach.

(ii) the wavelength of the waves near the beach

[1 marks] (c) Diagram 7.2 shows the seashore of a fishing village. During the rainy season, waves are big and can cause the jetty to collapse. The fishermen want to relocate the jetty.

Diagram 7.2 (a) (i) State the change in wavelength of the water waves from A to B. .................................................... [1 mark] (ii) Explain why the observation in (a)(i) occurs. ................................................. [1 mark]FIZIKMOZAC 2010

Diagram 7.2 (i) Suggest the location of the new jetty. ............................................... [1 mark]

(ii)

Explain the reason for this suggestion. ............................................... ............................................... [2 marks]

(c) Explain how this phenomenon occurs. ............................................................. ............................................................. ............................................................. [2 marks]

6. Question 4: Trengganu 07 Diagram 4 shows the pattern of water waves moving towards a gap between two walls at a water-theme park. Frequency of the water wave is 5 Hz.

7. Question 5 Diagram 5.1 shows the arrangement of the apparatus for an experiment to study a wave phenomenon. Diagram 5.2 shows the wave pattern formed on the screen when a plane waves pass through the gap.

Diagram 4 (a) (i) On Diagram 4, draw the pattern of water waves after passing through the gap. [2 marks] (ii) Name the wave phenomenon involved. ............................................................. [1 mark] (b) Calculate the velocity of the water waves. Diagram 5.1

[2 marks]

Diagram 5.2

FIZIKMOZAC 2010

(a) Name the wave phenomenon studied in this experiment. ........................................... .......................................................... [1 mark] (b) Observe Diagram 5.2, Compare the wavelengths and wave patterns of the waves before and after they pass through the gap. Wavelength: .................................. .................... Wave patterns: ............................... .................. [2 marks] (c) (i) State any change to the amplitude of the waves before and after they pass through the gap. ................................................... .......................... [1 mark] (ii) Explain the answer in (c)(i). ................................... ................................................... [1 mark] (d) The gap is made wider. (i) What is the effect on the waves passing through the gap? ................................ ............................................... [1 mark] In the space below draw the wave patterns after it pass through the wider gap.

(a) Based on Diagram 6.1 and Diagram 6.2, (i) What happens to the wave after passing round the log and the corner of the building? ............................................... [1 mark] (ii) What happens to the amplitude of the waves after passing round the log and the corner of the building? .......................................................... .......................................................... ................................................. [2 marks] (iii) Name the wave phenomenon that is related to Diagram 6.1 and Diagram 6.2. .. [1 mark]

(ii)

8. Question 5: Kedah 08 Diagram 6.1 shows a water waves passing through a log that floats in water. Diagram 6.2 shows a student standing at one corner of a building at B who can hear the sound from a loudspeaker at A.FIZIKMOZAC 2010

(iv) What will happen to the speed of the water waves after passing through the log? .. [1 mark] (b) Refering to Diagram 6.1, what will happen to a floating object that is placed at (i) P? [1 mark] (ii) Q? [1 mark] (c) Name one other wave phenomenon that occurs in Diagram 6.1. [1 mark] 9. Question 7: Melaka 08 Diagram 7.1 shows water waves passing through the entrance of a ugh model harbour.

(ii) State why the wave shape is only slightly change after passing the gap ........................................................ [ 1 mark] (b) Diagram 7.2 shows the cross sectional of the harbour wall that facing the waves. In Diagram 7.2 draw the waves after passing trough the gap.

(c) The model harbour in diagram 7.1 is ) to be use for commercial purposes. Suggest modifications to the harbour wall that enables i (i) to sustain the impact of the water wave ........................................................ ....................................................... [2 marks] (ii) to reduce the impact of the water wave to the shore ......................................................... ......................................................... [ 2 marks] (d) During dry season large ship is advice not to shelter at the harbour. Explain this situation and suggest a method sugges to load and unload the ship. ......................................................... [ 2 marks]

(a) (i) Name the type of wave is the water wave. ..................................................... [ 1 mark]FIZIKMOZAC 2010

10. Question 3: Perak 07 Diagram 3 shows a monochromatic light source connected to power supply. The light passes through the single slit and then go through the double-slit to form an interference pattern on the screen. Bright and dark fringes are observed on the white screen.

11. Question 4: SBP 08 Diagram 4 shows two identical water wave pulses moving towards each other. Wave interference occurs when the two waves meet at point O while propagating along the same medium.

Diagram 3 (a) What type of wave is the light wave? .............................................................. [1 mark] (b) Why bright fringes and dark fringes are observed on the screen? .............................................................. .............................................................. [2 marks] (c) What is monochromatic light? .............................................................. [1 mark] (d) In the experiment, and the screen is placed 5m from the double-slit. The distance between the double-slit is 0.5 mm. The distance between two adjacent bright fringes of the pattern is 6.0 mm. Calculate is the wavelength of the light waves? [2 marks]FIZIKMOZAC 2010

(a) What is meant by interference? ........................................................... ........................................................... [1 mark]

(i) In the box above , complete the diagram to show the interference of waves at point O. [1 mark] (ii) Name the type of interference occurs in (b)(i). .......................................................... [1 mark] (iii) State what will happen to the motion of the cork at