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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 131 · 40 questions
TalentJR

What you do (Only the length matters): 1. Tie the nut to the string and hang it from the taped pencil, 30 cm long. 2. Pull it a little to one side and let go — do not push. 3. Time 10 swings and divide by 10. 4. Change only the string length (60 cm), time 10 swings again, and stand back from the bob.

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  1. 1.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
  2. 2.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) it is wet (d) the bob could hit you
  3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we keep it the same (c) we measure it
  4. 4.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a shorter string (d) a longer string
  5. 5.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) no, hardly at all (d) it stops swinging
  6. 6.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
  7. 7.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) yeast (d) a stopwatch
  8. 8.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
  9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we change it (c) we measure it
  10. 10.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
  11. 11.True or false: a string is not needed for the pendulum. (a) False (b) True
  12. 12.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it becomes 4 times (d) it stays the same
  13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) True (b) False
  14. 14.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) turmeric powder (c) yeast (d) a magnet
  15. 15.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?
  16. 16.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
  17. 17.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 14 seconds?
  18. 18.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
  19. 19.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) one swing is too slow (c) 10 is a lucky number (d) it is more fun
  20. 20.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
  21. 21.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
  22. 22.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
  23. 23.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
  24. 24.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a stopwatch (c) a ruler (d) a string
  25. 25.True or false: a magnet is not needed for the pendulum. (a) False (b) True
  26. 26.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) turmeric powder (d) a pencil and tape
  27. 27.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) about the same (c) much slower (d) much faster
  28. 28.True or false: a mirror is needed for the pendulum. (a) True (b) False
  29. 29.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
  30. 30.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
  31. 31.True or false: a balloon is not needed for the pendulum. (a) True (b) False
  32. 32.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
  33. 33.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a small nut or washer (d) a sharp tool
  34. 34.🧺 Which of these is needed for the pendulum? (a) yeast (b) a battery cell (c) a ruler (d) a mirror
  35. 35.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
  36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “how far we pull it back”? (a) we keep it the same (b) we change it (c) we measure it
  37. 37.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the wind (d) the string
  38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a mirror (c) a string (d) a stopwatch
  39. 39.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
  40. 40.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a magnet (c) a pencil and tape (d) a stopwatch

Answer key

  1. False
  2. the bob could hit you
  3. we change it
  4. a longer string
  5. no, hardly at all
  6. 1
  7. yeast
  8. True
  9. we measure it
  10. needed
  11. False
  12. it doubles
  13. False
  14. a heavy nut or washer
  15. 19
  16. True
  17. 14
  18. True
  19. it is more accurate
  20. 10
  21. False
  22. needed
  23. True
  24. a balloon
  25. True
  26. turmeric powder
  27. about the same
  28. False
  29. False
  30. needed
  31. True
  32. not needed
  33. a small nut or washer
  34. a ruler
  35. not needed
  36. we keep it the same
  37. gravity
  38. a mirror
  39. 1
  40. a magnet

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