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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 11 · 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.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) 10 is a lucky number (d) it is more accurate
  2. 2.🧺 Do we need a string 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: the weight of the bob is what we measure. (a) False (b) True
  4. 4.⚖️ 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
  5. 5.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is wet (d) it is hot
  6. 6.⚖️ 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
  7. 7.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) gravity (d) the string
  8. 8.True or false: turmeric powder is not 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 “the same hook”? (a) we keep it the same (b) we measure it (c) we change it
  10. 10.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) about the same (d) it cannot swing
  11. 11.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a string (d) a balloon
  12. 12.🧺 Which of these is not needed for the pendulum? (a) a string (b) turmeric powder (c) a stopwatch (d) a pencil and tape
  13. 13.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a lighter bob (c) a heavier bob (d) a shorter string
  14. 14.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a battery cell (c) a balloon (d) a heavy nut or washer
  15. 15.⚖️ 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
  16. 16.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
  17. 17.True or false: a ruler is needed for the pendulum. (a) False (b) True
  18. 18.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
  19. 19.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a digital watch (d) a sundial
  20. 20.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a sharp tool (d) a glass bottle
  21. 21.True or false: a mirror is not needed for the pendulum. (a) True (b) False
  22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a battery cell (c) a ruler (d) a stopwatch
  23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a mirror (c) a heavy nut or washer (d) a string
  24. 24.True or false: a magnet is not needed for the pendulum. (a) True (b) False
  25. 25.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
  26. 26.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
  27. 27.⚖️ 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) how far we pull it back
  28. 28.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 54 seconds?
  29. 29.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
  30. 30.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
  31. 31.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
  32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a pencil and tape (d) a balloon
  33. 33.⚖️ 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
  34. 34.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) slower (d) stopped
  35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
  36. 36.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) it stops swinging (d) no, hardly at all
  37. 37.True or false: a balloon is needed for the pendulum. (a) False (b) True
  38. 38.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
  39. 39.True or false: a magnet is needed for the pendulum. (a) True (b) False
  40. 40.🧺 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 pencil and tape

Answer key

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

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