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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 642 · 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.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a heavy brick (d) a sharp tool
  2. 2.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 10 seconds?
  3. 3.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) slower (d) heavier
  4. 4.⚖️ 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 string length (c) the weight of the bob (d) time for 10 swings
  5. 5.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
  6. 6.True or false: a string is needed for the pendulum. (a) True (b) False
  7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the weight of the bob (c) the same hook (d) time for 10 swings
  8. 8.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it stays the same (d) it doubles
  9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a heavy nut or washer (d) yeast
  10. 10.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a mirror (d) a ruler
  11. 11.True or false: a string is not needed for the pendulum. (a) False (b) True
  12. 12.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) turmeric powder (d) a string
  13. 13.⚖️ 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
  14. 14.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) it is hot (d) the bob could hit you
  15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a magnet (d) a string
  16. 16.True or false: yeast is needed for the pendulum. (a) True (b) False
  17. 17.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a balloon (d) a string
  18. 18.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
  19. 19.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
  20. 20.⚖️ 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
  21. 21.True or false: a pencil and tape 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 string (b) a stopwatch (c) a heavy nut or washer (d) turmeric powder
  23. 23.True or false: a magnet is not needed for the pendulum. (a) True (b) False
  24. 24.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a stopwatch (d) a mirror
  25. 25.🕰️ 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) it is more fun (d) 10 is a lucky number
  26. 26.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
  27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a balloon (c) a pencil and tape (d) a string
  28. 28.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a phone (d) a grandfather clock
  29. 29.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
  30. 30.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
  31. 31.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) a ruler (d) a magnet
  32. 32.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
  33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is kept the same. (a) False (b) True
  34. 34.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
  35. 35.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
  36. 36.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
  37. 37.True or false: a magnet is needed for the pendulum. (a) True (b) False
  38. 38.🧺 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 battery cell (d) a string
  39. 39.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) turmeric powder (d) a pencil and tape
  40. 40.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a heavy nut or washer (c) a balloon (d) a mirror

Answer key

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

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