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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 921 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🕰️ 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) one swing is too slow (d) it is more accurate
  2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we measure it (c) we change it
  3. 3.🛟 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
  4. 4.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a sharp tool (d) a small nut or washer
  5. 5.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
  6. 6.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
  7. 7.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
  8. 8.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
  9. 9.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 33 seconds?
  10. 10.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a magnet (d) a heavy nut or washer
  11. 11.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
  12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we keep it the same (c) we measure it
  13. 13.🧺 Which of these is needed for the pendulum? (a) yeast (b) a ruler (c) a balloon (d) a magnet
  14. 14.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
  15. 15.⚖️ 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 weight of the bob (c) the same hook (d) the string length
  16. 16.⚖️ 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 measure it (b) we keep it the same (c) we change it
  17. 17.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
  18. 18.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a longer string (d) a heavier bob
  19. 19.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
  20. 20.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) quicker (d) stopped
  21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) how far we pull it back (c) the string length (d) time for 10 swings
  22. 22.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
  23. 23.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
  24. 24.True or false: a battery cell is needed for the pendulum. (a) True (b) False
  25. 25.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 32 seconds?
  26. 26.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
  27. 27.🧺 Which of these is needed for the pendulum? (a) yeast (b) a mirror (c) turmeric powder (d) a heavy nut or washer
  28. 28.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
  29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
  30. 30.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) gravity (d) the string
  31. 31.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 48 seconds?
  32. 32.⚖️ 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
  33. 33.True or false: yeast is needed for the pendulum. (a) False (b) True
  34. 34.⚖️ 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
  35. 35.True or false: a balloon is needed for the pendulum. (a) True (b) False
  36. 36.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
  37. 37.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a ruler (c) a string (d) a heavy nut or washer
  38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
  39. 39.True or false: a ruler is not needed for the pendulum. (a) True (b) False
  40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) the string length (c) time for 10 swings

Answer key

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

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