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In Fig. 7.15, A, B, C and D are the four pendulums suspended from the same elastic string XY. The lengths of pendulum A and D are equal, while the length of pendulum B is shorter and of the pendulum C is longer. The pendulum A is set into vibrations. (a) What is your observation about the virbations of pendulum D ? (b) Give reason for your observation in part (a). (c) What type of vibrations take place in pendulums B and C ? (d) Give reason for the answer in part (c) . |
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Answer» In Fig. 7.15, A, B, C and D are the four pendulums suspended from the same elastic string XY. The lengths of pendulum A and D are equal, while the length of pendulum B is shorter and of the pendulum C is longer. The pendulum A is set into vibrations. (a) What is your observation about the virbations of pendulum D ? (b) Give reason for your observation in part (a). (c) What type of vibrations take place in pendulums B and C ? (d) Give reason for the answer in part (c) .
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