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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 478 · 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.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we keep it the same (c) we measure it
  2. 2.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
  3. 3.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) yeast (d) a heavy nut or washer
  4. 4.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) it is more accurate (d) 10 is a lucky number
  5. 5.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) it is magnetic (d) the bob could hit you
  6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we change it (c) we keep it the same
  7. 7.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) it cannot swing (c) much faster (d) about the same
  8. 8.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
  9. 9.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
  10. 10.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) slower (d) stopped
  11. 11.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a string (c) yeast (d) a mirror
  12. 12.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
  13. 13.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the wind (d) the string
  14. 14.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a battery cell (c) yeast (d) a pencil and tape
  15. 15.🛟 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
  16. 16.True or false: a magnet is needed for the pendulum. (a) False (b) True
  17. 17.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
  18. 18.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much faster (c) yes, much slower (d) no, hardly at all
  19. 19.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) a balloon (d) a ruler
  20. 20.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
  21. 21.🧺 Which of these is needed for the pendulum? (a) yeast (b) a mirror (c) a stopwatch (d) a balloon
  22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a mirror (c) a ruler (d) a stopwatch
  23. 23.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
  24. 24.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) turmeric powder (d) a heavy nut or washer
  25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
  26. 26.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
  27. 27.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
  28. 28.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a sundial (d) a digital watch
  29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is kept the same. (a) True (b) False
  30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a string (d) a magnet
  31. 31.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
  32. 32.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
  33. 33.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
  34. 34.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a pencil and tape (c) a magnet (d) a string
  35. 35.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a longer string (d) a heavier bob
  36. 36.⚖️ 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 string length (c) the same hook (d) the weight of the bob
  37. 37.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
  38. 38.⚖️ 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
  39. 39.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a magnet (c) a battery cell (d) a ruler
  40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) False (b) True

Answer key

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

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