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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 498 · 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.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it becomes 4 times (d) it doubles
  2. 2.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) much slower (d) it cannot swing
  3. 3.⚖️ 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
  4. 4.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
  5. 5.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
  6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a pencil and tape (d) turmeric powder
  7. 7.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
  8. 8.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a phone (d) a grandfather clock
  9. 9.True or false: a mirror is not needed for the pendulum. (a) False (b) True
  10. 10.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
  11. 11.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
  12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
  13. 13.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
  14. 14.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
  15. 15.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) one swing is too slow (d) 10 is a lucky number
  16. 16.⚖️ 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 change it (b) we measure it (c) we keep it the same
  17. 17.True or false: a string is not needed for the pendulum. (a) False (b) True
  18. 18.⚖️ 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
  19. 19.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
  20. 20.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a mirror (c) a heavy nut or washer (d) yeast
  21. 21.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
  22. 22.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
  23. 23.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
  24. 24.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
  25. 25.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) quicker (d) heavier
  26. 26.True or false: a ruler is not needed for the pendulum. (a) True (b) False
  27. 27.⚖️ 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 same hook (c) the string length
  28. 28.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) a pencil and tape (d) a battery cell
  29. 29.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
  30. 30.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a magnet (d) a pencil and tape
  31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) False (b) True
  32. 32.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
  33. 33.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 38 seconds?
  34. 34.🛟 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
  35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the weight of the bob
  36. 36.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) no, hardly at all (d) yes, much slower
  37. 37.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
  38. 38.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) yeast (d) a ruler
  39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) yeast (c) a stopwatch (d) a string
  40. 40.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed

Answer key

  1. it doubles
  2. about the same
  3. how far we pull it back
  4. not needed
  5. needed
  6. turmeric powder
  7. False
  8. a grandfather clock
  9. True
  10. needed
  11. 2
  12. we keep it the same
  13. not needed
  14. needed
  15. it is more accurate
  16. we keep it the same
  17. False
  18. False
  19. 3
  20. a heavy nut or washer
  21. True
  22. False
  23. 5
  24. needed
  25. quicker
  26. False
  27. the same hook
  28. a pencil and tape
  29. False
  30. a magnet
  31. True
  32. not needed
  33. 19
  34. a small nut or washer
  35. the weight of the bob
  36. no, hardly at all
  37. 15
  38. yeast
  39. yeast
  40. not needed

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