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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 345 · 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.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a sharp tool (d) a heavy brick
  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 change it (c) we measure it
  3. 3.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) stopped (d) quicker
  4. 4.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
  5. 5.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it becomes 4 times (c) it halves (d) it stays the same
  6. 6.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
  7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False
  8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we change it (c) we keep it the same
  9. 9.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) the bob could hit you (d) it is hot
  10. 10.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a battery cell (c) a heavy nut or washer (d) a string
  11. 11.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
  12. 12.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) much slower (d) about the same
  13. 13.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) it stops swinging (d) no, hardly at all
  14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a mirror (c) a pencil and tape (d) a heavy nut or washer
  15. 15.True or false: a string is needed for the pendulum. (a) True (b) False
  16. 16.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
  17. 17.True or false: a string is not needed for the pendulum. (a) False (b) True
  18. 18.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
  19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we measure it (c) we change it
  20. 20.⚖️ 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
  21. 21.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
  22. 22.⚖️ 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) False (b) True
  23. 23.🕰️ 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) it is more accurate (d) one swing is too slow
  24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a string (c) a ruler (d) a pencil and tape
  25. 25.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
  26. 26.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
  27. 27.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
  28. 28.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a balloon (d) a ruler
  29. 29.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
  30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a pencil and tape (d) yeast
  31. 31.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
  32. 32.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
  33. 33.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
  34. 34.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a heavy nut or washer (c) a battery cell (d) a magnet
  35. 35.🧺 Which of these is needed for the pendulum? (a) a mirror (b) turmeric powder (c) yeast (d) a string
  36. 36.True or false: a balloon is needed for the pendulum. (a) True (b) False
  37. 37.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 32 seconds?
  38. 38.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a balloon (c) a pencil and tape (d) a magnet
  39. 39.⚖️ 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 weight of the bob (c) the string length
  40. 40.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the wind (c) magnetism (d) the string

Answer key

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

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