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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 126 · 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? Which of these is what we measure? (a) the string length (b) time for 10 swings (c) the same hook (d) how far we pull it back
  2. 2.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a magnet (c) a battery cell (d) turmeric powder
  3. 3.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a pencil and tape (d) a balloon
  4. 4.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a lighter bob (d) a shorter string
  5. 5.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
  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.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it halves (c) it stays the same (d) it doubles
  8. 8.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much slower (c) it cannot swing (d) much faster
  9. 9.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
  10. 10.True or false: a magnet is needed for the pendulum. (a) False (b) True
  11. 11.True or false: a balloon is needed for the pendulum. (a) True (b) False
  12. 12.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
  13. 13.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
  14. 14.⚖️ 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 measure it (c) we change it
  15. 15.⚖️ 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 same hook (c) the weight of the bob (d) the string length
  16. 16.⚖️ 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
  17. 17.True or false: a battery cell is needed for the pendulum. (a) False (b) True
  18. 18.🛟 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
  19. 19.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a sundial (d) a grandfather clock
  20. 20.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the wind (c) the string (d) magnetism
  21. 21.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
  22. 22.⚖️ 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
  23. 23.🛟 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
  24. 24.⚖️ 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
  25. 25.🧺 Which of these is needed for the pendulum? (a) yeast (b) a mirror (c) a battery cell (d) a stopwatch
  26. 26.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
  27. 27.True or false: a magnet is not needed for the pendulum. (a) False (b) True
  28. 28.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
  29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a string (c) a heavy nut or washer (d) a pencil and tape
  30. 30.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) a magnet (d) a pencil and tape
  31. 31.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
  32. 32.True or false: a mirror is not needed for the pendulum. (a) True (b) False
  33. 33.⚖️ 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
  34. 34.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
  35. 35.True or false: a ruler is needed for the pendulum. (a) False (b) True
  36. 36.⚖️ 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
  37. 37.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
  38. 38.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
  39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) False (b) True
  40. 40.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed

Answer key

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

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