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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 835 · 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 heavy nut or washer for the pendulum? (a) not needed (b) needed
  2. 2.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a sundial (d) a phone
  3. 3.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
  4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) True (b) False
  5. 5.True or false: yeast is not needed for the pendulum. (a) False (b) True
  6. 6.🛟 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
  7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) time for 10 swings (c) the weight of the bob (d) the string length
  8. 8.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a pencil and tape (c) a heavy nut or washer (d) a ruler
  9. 9.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
  10. 10.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
  11. 11.🧺 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 string (d) turmeric powder
  12. 12.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 57 seconds?
  13. 13.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
  14. 14.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a heavy nut or washer (d) a battery cell
  15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a balloon (d) a string
  16. 16.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 30 seconds?
  17. 17.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a small nut or washer (d) a glass bottle
  18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the weight of the bob (c) time for 10 swings (d) the string length
  19. 19.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) quicker (d) heavier
  20. 20.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it doubles (d) it halves
  21. 21.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
  22. 22.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
  23. 23.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
  24. 24.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
  25. 25.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
  26. 26.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
  27. 27.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a pencil and tape (c) turmeric powder (d) a magnet
  28. 28.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
  29. 29.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?
  30. 30.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
  31. 31.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
  32. 32.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) gravity (d) the string
  33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we change it (c) we keep it the same
  34. 34.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) it cannot swing (c) much faster (d) much slower
  35. 35.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a heavy nut or washer (c) a stopwatch (d) a string
  36. 36.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a ruler (d) a mirror
  37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a pencil and tape (d) a battery cell
  38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) False (b) True
  39. 39.⚖️ 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 keep it the same (b) we change it (c) we measure it
  40. 40.⚖️ 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) True (b) False

Answer key

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

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