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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 374 · 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.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
  2. 2.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
  3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) yeast (c) a pencil and tape (d) a stopwatch
  4. 4.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
  5. 5.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
  6. 6.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a grandfather clock (d) a sundial
  7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the string length (c) the weight of the bob (d) how far we pull it back
  8. 8.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it halves (d) it doubles
  9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a heavy nut or washer (d) a magnet
  10. 10.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
  11. 11.True or false: a battery cell is needed for the pendulum. (a) True (b) False
  12. 12.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
  13. 13.🧺 Which of these is needed for the pendulum? (a) a ruler (b) yeast (c) a mirror (d) a balloon
  14. 14.🔮 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
  15. 15.⚖️ 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) time for 10 swings (c) the string length (d) the weight of the bob
  16. 16.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) it is magnetic (d) the bob could hit you
  17. 17.True or false: a string is not needed for the pendulum. (a) True (b) False
  18. 18.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
  19. 19.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
  20. 20.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a lighter bob (d) a shorter string
  21. 21.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 51 seconds?
  22. 22.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
  23. 23.⚖️ 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
  24. 24.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
  25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we measure it (c) we keep it the same
  26. 26.⚖️ 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) False (b) True
  27. 27.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
  28. 28.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) yeast (c) a heavy nut or washer (d) a stopwatch
  29. 29.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) it stops swinging (c) yes, much faster (d) yes, much slower
  30. 30.True or false: a magnet is not needed for the pendulum. (a) True (b) False
  31. 31.True or false: a magnet is needed for the pendulum. (a) False (b) True
  32. 32.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
  33. 33.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
  34. 34.🛟 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
  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) False (b) True
  36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we change it (c) we keep it the same
  37. 37.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a string (c) a battery cell (d) a magnet
  38. 38.⚖️ 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) True (b) False
  39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we keep it the same (c) we measure it
  40. 40.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed

Answer key

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

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