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JSS2: ENGLISH LANGUAGE - 1ST TERM

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Topic Content:

  • Title: One Pendulum to Another
  • Text: New Oxford Secondary English Book 2 by Ayo Banjo et al page 25.
  • Comprehension Questions & Answers

This passage discusses an interesting and amusing physics experiment which shows vibrations.

one pendulum to another

One Pendulum to Another:

There is an interesting and amusing physics experiment which shows that vibrations, regular and repeated movements, may be passed from one thing to another. Make two small pendulums by tying weights to strings. Make the pendulum as nearly equal in length as possible.

     Tie a piece of string between two chairs so that it hangs between them. Then tie the two pendulums to this piece of string, placing them about 30 centimetres apart.

     Make sure that one pendulum is hanging straight down and is quite still. Then make the weight at the end of the second string begin to swing.

     As the second pendulum swings forwards and backwards, notice that the first pendulum is beginning to swing in the same way. It will even continue to swing after the second pendulum has stopped. But, after a little while, the second pendulum will start to swing again, and may also continue swinging after the first pendulum has stopped.

     The experiment clearly shows that, if one thing is moving in a regular way, repeating the same movement again and again, it may cause another thing to move in exactly the same way.

Exercise:

New Oxford English – JSS 2 Page 25 – 26, Questions 1 – 10

1. What are vibrations?

2. What does this experiment show?

3. How long is one of the pendulums compared with the other?

4. How many pieces of string are needed for this experiment: two, three, or four?

5. What must be 30 centimetres apart, the chairs or the pendulum?

6. We must make sure that something is quite still. What?

7. When the writer speaks of the second pendulum, does he mean the one that swings first or the other one that swings next?

8. The two pendulums do not stop swinging at the same time. Which one goes on swinging after the other one has stopped, the first or second?

9. What happens before the first pendulum has stopped swinging?

10. If one thing is vibrating, what may it cause another thing to do?

View Answers

Exercise: One Pendulum to Another 

1. What are vibrations?

Answer: Vibrations are regular and repeated movements.

2. What does this experiment show.

Answer: It shows that vibrations may be passed from one thing to another.

3. How long is one of the pendulums compared with the other?

Answer: The pendulums are nearly equal in length.

4. How many pieces of string are needed for this experiment: two, three, or four?

Answer: Three.

5. What must be 30 centimetres apart, the chairs or the pendulum?

Answer: The pendulum.

6. We must make sure that something is quite still. What?

Answer: One pendulum.

7. When the writer speaks of the second pendulum, does he mean the one that swings first or the other one that swings next?

Answer: The one that swings first.

8. The two pendulums do not stop swinging at the same time. Which one goes on swinging after the other one has stopped, the first or second?

Answer: The first pendulum.

9. What happens before the first pendulum has stopped swinging?

Answer: The second pendulum will start to swing again.

10. If one thing is vibrating, what may it cause another thing to do?

Answer: It may cause another thing to move in exactly the same way.