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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 119 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
  2. 2.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
  3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
  4. 4.True or false: yeast is needed for the pendulum. (a) False (b) True
  5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a mirror (d) a heavy nut or washer
  6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) the weight of the bob (c) the string length (d) how far we pull it back
  7. 7.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) stopped (d) slower
  8. 8.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
  9. 9.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
  10. 10.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
  11. 11.🧺 Which of these is needed for the pendulum? (a) a ruler (b) yeast (c) a balloon (d) a magnet
  12. 12.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a mirror (c) a pencil and tape (d) a ruler
  13. 13.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
  14. 14.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) about the same (d) much faster
  15. 15.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) it is more accurate (c) one swing is too slow (d) 10 is a lucky number
  16. 16.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
  17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) turmeric powder (d) a pencil and tape
  18. 18.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
  19. 19.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a small nut or washer (d) a sharp tool
  20. 20.⚖️ 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 keep it the same (c) we measure it
  21. 21.⚖️ 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) the string length (c) the same hook
  22. 22.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
  23. 23.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
  24. 24.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it becomes 4 times (c) it stays the same (d) it halves
  25. 25.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a shorter string (d) a longer string
  26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a ruler (d) yeast
  27. 27.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a sundial (d) a grandfather clock
  28. 28.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) gravity (d) magnetism
  29. 29.True or false: a ruler is not needed for the pendulum. (a) False (b) True
  30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is kept the same. (a) True (b) False
  31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a pencil and tape (c) a string (d) a heavy nut or washer
  32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a magnet (d) a stopwatch
  33. 33.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a mirror (c) a pencil and tape (d) a balloon
  34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
  35. 35.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a balloon (d) a ruler
  36. 36.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
  37. 37.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is magnetic (d) it is wet
  38. 38.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 22 seconds?
  39. 39.True or false: a ruler is needed for the pendulum. (a) True (b) False
  40. 40.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?

Answer key

  1. 3
  2. not needed
  3. True
  4. False
  5. a mirror
  6. the string length
  7. quicker
  8. 20
  9. False
  10. 1
  11. a ruler
  12. a mirror
  13. needed
  14. about the same
  15. it is more accurate
  16. not needed
  17. turmeric powder
  18. needed
  19. a small nut or washer
  20. we keep it the same
  21. the same hook
  22. not needed
  23. not needed
  24. it doubles
  25. a longer string
  26. yeast
  27. a grandfather clock
  28. gravity
  29. False
  30. True
  31. a balloon
  32. a magnet
  33. a pencil and tape
  34. True
  35. a balloon
  36. False
  37. the bob could hit you
  38. 11
  39. True
  40. 5

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