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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 24 · 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.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a small nut or washer (d) a heavy brick
  2. 2.True or false: a mirror is needed for the pendulum. (a) True (b) False
  3. 3.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
  4. 4.⚖️ 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
  5. 5.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
  6. 6.True or false: a ruler is needed for the pendulum. (a) False (b) True
  7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a stopwatch (d) a magnet
  8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) True (b) False
  9. 9.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
  10. 10.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
  11. 11.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
  12. 12.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it becomes 4 times (d) it doubles
  13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) turmeric powder (d) a stopwatch
  14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a string (c) a stopwatch (d) a heavy nut or washer
  15. 15.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
  16. 16.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
  17. 17.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a shorter string (d) a heavier bob
  18. 18.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
  19. 19.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 22 seconds?
  20. 20.⚖️ 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
  21. 21.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
  22. 22.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) the string (d) magnetism
  23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) yeast (d) a string
  24. 24.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a mirror (c) a battery cell (d) a balloon
  25. 25.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
  26. 26.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
  27. 27.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a ruler (c) a heavy nut or washer (d) a magnet
  28. 28.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) it cannot swing (d) much faster
  29. 29.🧺 Which of these is needed for the pendulum? (a) a mirror (b) yeast (c) a pencil and tape (d) a balloon
  30. 30.True or false: yeast is needed for the pendulum. (a) False (b) True
  31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a heavy nut or washer (d) a battery cell
  32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) the string length (c) time for 10 swings
  33. 33.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
  34. 34.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a string (d) a magnet
  35. 35.True or false: a balloon is not needed for the pendulum. (a) False (b) True
  36. 36.⚖️ 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
  37. 37.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a stopwatch (d) yeast
  38. 38.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) the bob could hit you (d) it is magnetic
  39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the same hook (c) time for 10 swings (d) the weight of the bob
  40. 40.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False

Answer key

  1. a small nut or washer
  2. False
  3. 10
  4. False
  5. 6
  6. True
  7. a magnet
  8. False
  9. 1
  10. not needed
  11. needed
  12. it doubles
  13. turmeric powder
  14. a balloon
  15. 1
  16. quicker
  17. a longer string
  18. not needed
  19. 11
  20. we keep it the same
  21. not needed
  22. gravity
  23. yeast
  24. a ruler
  25. needed
  26. not needed
  27. a magnet
  28. about the same
  29. a pencil and tape
  30. False
  31. a battery cell
  32. how far we pull it back
  33. False
  34. a string
  35. True
  36. we keep it the same
  37. yeast
  38. the bob could hit you
  39. the string length
  40. False

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