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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 500 · 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.🧺 Which of these is needed for the pendulum? (a) yeast (b) a magnet (c) turmeric powder (d) a ruler
  2. 2.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a longer string (d) a shorter string
  3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a string (c) a stopwatch (d) a ruler
  4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a pencil and tape (c) a heavy nut or washer (d) a string
  5. 5.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) a battery cell (d) turmeric powder
  6. 6.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a sundial (d) a phone
  7. 7.True or false: a ruler is needed for the pendulum. (a) True (b) False
  8. 8.🧺 Which of these is needed for the pendulum? (a) yeast (b) a mirror (c) a pencil and tape (d) a battery cell
  9. 9.True or false: a string is not needed for the pendulum. (a) False (b) True
  10. 10.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
  11. 11.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
  12. 12.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
  13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we measure it (c) we keep it the same
  14. 14.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a small nut or washer (d) a glass bottle
  15. 15.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
  16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) yeast (d) a string
  17. 17.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 30 seconds?
  18. 18.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) it cannot swing (d) about the same
  19. 19.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
  20. 20.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) quicker (d) stopped
  21. 21.⚖️ 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) False (b) True
  22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a ruler (c) a stopwatch (d) a string
  23. 23.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
  24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the weight of the bob (c) how far we pull it back (d) time for 10 swings
  25. 25.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a battery cell (c) a pencil and tape (d) a string
  26. 26.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a mirror (d) a heavy nut or washer
  27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) False (b) True
  28. 28.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) yes, much faster (d) it stops swinging
  29. 29.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is magnetic (d) it is hot
  30. 30.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
  31. 31.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 11 seconds?
  32. 32.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
  33. 33.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a balloon (d) a string
  34. 34.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it halves (c) it stays the same (d) it doubles
  35. 35.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
  36. 36.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
  37. 37.True or false: a mirror is needed for the pendulum. (a) False (b) True
  38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) how far we pull it back (c) the string length
  39. 39.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a stopwatch (c) a magnet (d) a balloon
  40. 40.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?

Answer key

  1. a ruler
  2. a longer string
  3. a magnet
  4. a mirror
  5. a heavy nut or washer
  6. a grandfather clock
  7. True
  8. a pencil and tape
  9. False
  10. 5
  11. needed
  12. not needed
  13. we keep it the same
  14. a small nut or washer
  15. not needed
  16. yeast
  17. 10
  18. about the same
  19. needed
  20. quicker
  21. False
  22. a balloon
  23. not needed
  24. time for 10 swings
  25. a battery cell
  26. a mirror
  27. False
  28. no, hardly at all
  29. the bob could hit you
  30. False
  31. 11
  32. not needed
  33. a string
  34. it doubles
  35. False
  36. False
  37. False
  38. how far we pull it back
  39. a stopwatch
  40. 20

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