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PES Skill Sheets.book - Capital High School

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<strong>Skill</strong> Sheet 24.1: Harmonic Motion Graphs<br />

1. Answers are:<br />

a. A = 5 degrees; B = 100 cm<br />

b. A = 1 second; B = 2 seconds<br />

2. Answers are:<br />

a. Diagram:<br />

<strong>Skill</strong> Sheet 24.2: Waves<br />

1. Diagram:<br />

a. Two wavelengths<br />

b. The amplitude of a wave is the distance that the wave<br />

moves beyond the average point of its motion. In the<br />

graphic, the amplitude of the wave is 5 centimeters.<br />

2. Answers are:<br />

a. Diagram:<br />

<strong>Skill</strong> Sheet 24.2: Wave Interference<br />

1. Diagram:<br />

2. 4 blocks<br />

3. 2 blocks<br />

4. 32 blocks<br />

5. 4 blocks<br />

6. 1 wavelength<br />

7. 8 wavelengths<br />

Page 49 of 57<br />

b. Diagram:<br />

b. Diagram:<br />

3. 10 m/s<br />

4. 5 m<br />

5. 10 Hz<br />

6. frequency = 0.5 Hz; speed = 2 m/s<br />

7. frequency = 165 Hz; period = 0.006 s<br />

8. A’s speed is 75 m/s, and B’s speed is 65 m/s, so A is faster.<br />

9. Answers are:<br />

a. 4 s<br />

b. 0.25 Hz<br />

c. 0.75 m/s<br />

8. A portion of the table and a graphic of the new wave are<br />

shown below. The values for the third column of the table are<br />

found by added the heights for wave 1 and wave 2.<br />

x<br />

(blocks)<br />

Height wave 1<br />

(blocks)<br />

Height wave 2<br />

(blocks)<br />

Height of wave 1<br />

+2 (blocks)<br />

0 0 0 0<br />

1 0.8 2 2.8<br />

2 1.5 0 1.5<br />

3 2.2 –2 0.2<br />

4 2.8 0 2.8<br />

5 3.3 2 5.3<br />

6 3.7 0 3.7<br />

7 3.9 –2 –1.9<br />

8 4 0 4

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