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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 343 · 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.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is wet (d) it is hot
  2. 2.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it becomes 4 times (d) it stays the same
  3. 3.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
  4. 4.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a heavy nut or washer (c) turmeric powder (d) yeast
  5. 5.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) slower (d) heavier
  6. 6.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
  7. 7.True or false: a ruler is needed for the pendulum. (a) True (b) False
  8. 8.⚖️ 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
  9. 9.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) gravity (d) the wind
  10. 10.True or false: a magnet is needed for the pendulum. (a) False (b) True
  11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a stopwatch (d) a magnet
  12. 12.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) turmeric powder (d) a string
  13. 13.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) about the same (c) much faster (d) much slower
  14. 14.⚖️ 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 weight of the bob (d) the string length
  15. 15.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) a mirror (d) a stopwatch
  16. 16.🧺 Which of these is needed for the pendulum? (a) a mirror (b) yeast (c) a balloon (d) a ruler
  17. 17.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
  18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the same hook
  19. 19.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a ruler (c) a stopwatch (d) a string
  20. 20.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
  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) the string length (c) the weight of the bob (d) time for 10 swings
  22. 22.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
  23. 23.True or false: a balloon is needed for the pendulum. (a) False (b) True
  24. 24.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) a pencil and tape (d) a magnet
  25. 25.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
  26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a balloon (c) a heavy nut or washer (d) a string
  27. 27.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
  28. 28.⚖️ 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 keep it the same (c) we change it
  29. 29.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
  30. 30.True or false: a balloon is not needed for the pendulum. (a) True (b) False
  31. 31.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
  32. 32.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
  33. 33.True or false: yeast is not needed for the pendulum. (a) False (b) True
  34. 34.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
  35. 35.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a shorter string (c) a heavier bob (d) a lighter bob
  36. 36.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
  37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the string length (c) the weight of the bob
  38. 38.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) yeast (c) a stopwatch (d) a string
  39. 39.⚖️ 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
  40. 40.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?

Answer key

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

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