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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 207 · 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 accurate (c) 10 is a lucky number (d) it is more fun
  2. 2.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a glass bottle (d) a small nut or washer
  3. 3.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a ruler (c) a string (d) yeast
  4. 4.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it doubles (d) it becomes 4 times
  5. 5.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) stopped (c) slower (d) heavier
  6. 6.⚖️ 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
  7. 7.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
  8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) time for 10 swings (c) the string length (d) how far we pull it back
  9. 9.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
  10. 10.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
  11. 11.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
  12. 12.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) about the same (d) much slower
  13. 13.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much slower (d) yes, much faster
  14. 14.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a lighter bob (d) a longer string
  15. 15.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 22 seconds?
  16. 16.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
  17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a stopwatch (c) a string (d) a ruler
  18. 18.True or false: yeast is needed for the pendulum. (a) True (b) False
  19. 19.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
  20. 20.True or false: a magnet is not needed for the pendulum. (a) True (b) False
  21. 21.True or false: a battery cell is needed for the pendulum. (a) False (b) True
  22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a string (d) yeast
  23. 23.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) a string (d) a ruler
  24. 24.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
  25. 25.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
  26. 26.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
  27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
  28. 28.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) it is magnetic (d) the bob could hit you
  29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the same hook (c) how far we pull it back (d) the weight of the bob
  30. 30.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a magnet (c) a heavy nut or washer (d) a battery cell
  31. 31.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
  32. 32.True or false: a magnet is needed for the pendulum. (a) True (b) False
  33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) a stopwatch (d) a balloon
  34. 34.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
  35. 35.⚖️ 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
  36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) False (b) True
  37. 37.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
  38. 38.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
  39. 39.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) a string (d) a magnet
  40. 40.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a phone (d) a digital watch

Answer key

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

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