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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 102 · 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.

NameDateTime takenScore ___ / 40
  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) the same hook (c) the weight of the bob (d) time for 10 swings
  2. 2.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) the bob could hit you (d) it is wet
  3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a mirror (d) a pencil and tape
  4. 4.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
  5. 5.⚖️ 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) True (b) False
  6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a ruler (d) a magnet
  7. 7.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) magnetism (d) the string
  8. 8.True or false: a balloon is needed for the pendulum. (a) False (b) True
  9. 9.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a sharp tool (d) a small nut or washer
  10. 10.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
  11. 11.⚖️ 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 keep it the same (c) we measure it
  12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we measure it (c) we keep it the same
  13. 13.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) a ruler (d) a magnet
  14. 14.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
  15. 15.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
  16. 16.True or false: a ruler is needed for the pendulum. (a) True (b) False
  17. 17.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a phone (d) a sundial
  18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a heavy nut or washer (c) a stopwatch (d) a string
  19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a heavy nut or washer (d) yeast
  20. 20.🧺 Which of these is needed for the pendulum? (a) yeast (b) a stopwatch (c) a balloon (d) a magnet
  21. 21.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
  22. 22.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
  23. 23.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
  24. 24.True or false: a mirror is not needed for the pendulum. (a) False (b) True
  25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we change it (c) we measure it
  26. 26.🧺 Which of these is needed for the pendulum? (a) a mirror (b) yeast (c) a balloon (d) a heavy nut or washer
  27. 27.⚖️ 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) False (b) True
  28. 28.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 48 seconds?
  29. 29.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) yeast (c) a pencil and tape (d) a stopwatch
  30. 30.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a battery cell (d) a string
  31. 31.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) it cannot swing (d) about the same
  32. 32.True or false: yeast is needed for the pendulum. (a) False (b) True
  33. 33.⚖️ 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
  34. 34.True or false: yeast is not needed for the pendulum. (a) True (b) False
  35. 35.True or false: a magnet is not needed for the pendulum. (a) True (b) False
  36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
  37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a pencil and tape (d) a balloon
  38. 38.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
  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) True (b) False
  40. 40.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False

Answer key

  1. time for 10 swings
  2. the bob could hit you
  3. a mirror
  4. 1
  5. False
  6. a magnet
  7. gravity
  8. False
  9. a small nut or washer
  10. 3
  11. we keep it the same
  12. we change it
  13. a magnet
  14. needed
  15. 10
  16. True
  17. a grandfather clock
  18. a battery cell
  19. yeast
  20. a stopwatch
  21. needed
  22. 2
  23. 12
  24. True
  25. we keep it the same
  26. a heavy nut or washer
  27. False
  28. 16
  29. yeast
  30. a string
  31. about the same
  32. False
  33. False
  34. True
  35. True
  36. True
  37. a balloon
  38. 3
  39. False
  40. False

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