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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 713 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) turmeric powder (c) a stopwatch (d) a string
  2. 2.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a stopwatch (c) a ruler (d) a heavy nut or washer
  3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
  4. 4.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
  5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we measure it (c) we change it
  6. 6.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) no, hardly at all (c) yes, much slower (d) it stops swinging
  7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a battery cell (d) a pencil and tape
  8. 8.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) the wind (c) magnetism (d) gravity
  9. 9.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
  10. 10.True or false: a balloon is not needed for the pendulum. (a) True (b) False
  11. 11.⚖️ 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
  12. 12.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it becomes 4 times (d) it stays the same
  13. 13.🧺 Which of these is not needed for the pendulum? (a) a string (b) a mirror (c) a ruler (d) a pencil and tape
  14. 14.True or false: a magnet is needed for the pendulum. (a) True (b) False
  15. 15.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) it cannot swing (d) about the same
  16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
  17. 17.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 34 seconds?
  18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a ruler (d) a balloon
  19. 19.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a grandfather clock (d) a sundial
  20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we change it (c) we keep it the same
  21. 21.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a shorter string (c) a heavier bob (d) a lighter bob
  22. 22.True or false: a mirror is needed for the pendulum. (a) True (b) False
  23. 23.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
  24. 24.🛟 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
  25. 25.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a ruler (d) a battery cell
  26. 26.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
  27. 27.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) yeast (d) a heavy nut or washer
  28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the string length (c) the weight of the bob (d) how far we pull it back
  29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a ruler (c) a heavy nut or washer (d) a string
  30. 30.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
  31. 31.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) one swing is too slow (d) it is more accurate
  32. 32.True or false: a mirror is not needed for the pendulum. (a) False (b) True
  33. 33.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
  34. 34.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
  35. 35.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
  36. 36.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
  37. 37.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a pencil and tape (c) yeast (d) a mirror
  38. 38.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
  39. 39.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a mirror (d) a string
  40. 40.True or false: yeast is needed for the pendulum. (a) True (b) False

Answer key

  1. turmeric powder
  2. a balloon
  3. False
  4. needed
  5. we measure it
  6. no, hardly at all
  7. a battery cell
  8. gravity
  9. True
  10. True
  11. False
  12. it doubles
  13. a mirror
  14. False
  15. about the same
  16. False
  17. 17
  18. a balloon
  19. a grandfather clock
  20. we keep it the same
  21. a longer string
  22. False
  23. True
  24. the bob could hit you
  25. a ruler
  26. needed
  27. yeast
  28. the string length
  29. a mirror
  30. 2
  31. it is more accurate
  32. True
  33. needed
  34. 1
  35. not needed
  36. 6
  37. a pencil and tape
  38. not needed
  39. a string
  40. False

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