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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 439 · 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.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a magnet (d) a battery cell
  2. 2.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a heavier bob (d) a shorter string
  3. 3.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) quicker (d) stopped
  4. 4.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
  5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we measure it (c) we change it
  6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a mirror (c) a ruler (d) a stopwatch
  7. 7.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is hot (d) it is wet
  8. 8.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a mirror (c) a string (d) a stopwatch
  9. 9.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
  10. 10.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
  11. 11.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
  12. 12.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
  13. 13.True or false: a mirror is not needed for the pendulum. (a) False (b) True
  14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
  15. 15.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a stopwatch (c) a balloon (d) a battery cell
  16. 16.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a heavy brick (d) a sharp tool
  17. 17.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a magnet (c) turmeric powder (d) a battery cell
  18. 18.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
  19. 19.True or false: a ruler is needed for the pendulum. (a) True (b) False
  20. 20.True or false: yeast is needed for the pendulum. (a) True (b) False
  21. 21.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
  22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) turmeric powder (d) a stopwatch
  23. 23.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
  24. 24.True or false: a magnet is not needed for the pendulum. (a) False (b) True
  25. 25.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) much slower (d) about the same
  26. 26.⚖️ 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 keep it the same (c) we measure it
  27. 27.⚖️ 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 change it (b) we keep it the same (c) we measure it
  28. 28.⚖️ 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
  29. 29.⚖️ 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
  30. 30.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a heavy nut or washer (d) a magnet
  31. 31.⚖️ 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) the string length (c) time for 10 swings (d) the same hook
  32. 32.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
  33. 33.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
  34. 34.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
  35. 35.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) it is more accurate (d) one swing is too slow
  36. 36.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
  37. 37.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
  38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a balloon (d) a string
  39. 39.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
  40. 40.True or false: a stopwatch is needed for the pendulum. (a) False (b) True

Answer key

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

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