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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 585 · 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.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a heavier bob (d) a shorter string
  2. 2.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
  3. 3.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is magnetic (d) it is wet
  4. 4.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
  5. 5.⚖️ 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) how far we pull it back (d) the same hook
  6. 6.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a balloon (c) a mirror (d) a string
  7. 7.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
  8. 8.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) much slower (d) it cannot swing
  9. 9.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
  10. 10.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a phone (d) a grandfather clock
  11. 11.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a heavy brick (d) a small nut or washer
  12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a pencil and tape (d) a mirror
  13. 13.⚖️ 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
  14. 14.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 22 seconds?
  15. 15.True or false: a balloon is needed for the pendulum. (a) False (b) True
  16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a ruler (d) turmeric powder
  17. 17.True or false: yeast is needed for the pendulum. (a) True (b) False
  18. 18.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
  19. 19.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
  20. 20.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the string (d) the wind
  21. 21.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
  22. 22.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
  23. 23.True or false: a ruler is not needed for the pendulum. (a) False (b) True
  24. 24.True or false: a battery cell is needed for the pendulum. (a) True (b) False
  25. 25.True or false: a magnet is needed for the pendulum. (a) False (b) True
  26. 26.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a battery cell (c) a mirror (d) a stopwatch
  27. 27.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
  28. 28.🧺 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
  29. 29.⚖️ 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
  30. 30.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
  31. 31.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) no, hardly at all (d) yes, much slower
  32. 32.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) a heavy nut or washer (d) a balloon
  33. 33.⚖️ 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
  34. 34.True or false: a string is needed for the pendulum. (a) False (b) True
  35. 35.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
  36. 36.True or false: a balloon is not needed for the pendulum. (a) True (b) False
  37. 37.⚖️ 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 change it (b) we measure it (c) we keep it the same
  38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
  39. 39.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
  40. 40.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed

Answer key

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

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