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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 308 · 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.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it doubles (d) it becomes 4 times
  2. 2.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a stopwatch (c) turmeric powder (d) a magnet
  3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a string (d) a battery cell
  4. 4.⚖️ 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
  5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) the weight of the bob (c) how far we pull it back (d) the string length
  6. 6.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
  7. 7.⚖️ 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
  8. 8.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a glass bottle (d) a small nut or washer
  9. 9.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the wind (d) the string
  10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) yeast (d) a ruler
  11. 11.⚖️ 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 measure it (c) we keep it the same
  12. 12.True or false: a battery cell is needed for the pendulum. (a) True (b) False
  13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a pencil and tape (d) a magnet
  14. 14.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a pencil and tape (c) yeast (d) a magnet
  15. 15.🧺 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
  16. 16.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
  17. 17.⚖️ 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 measure it (c) we change it
  18. 18.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
  19. 19.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a string (c) a stopwatch (d) a pencil and tape
  20. 20.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
  21. 21.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
  22. 22.🧺 Which of these is needed for the pendulum? (a) yeast (b) a mirror (c) a magnet (d) a string
  23. 23.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
  24. 24.🔮 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
  25. 25.🛟 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
  26. 26.True or false: a balloon is not needed for the pendulum. (a) False (b) True
  27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a balloon (c) a string (d) a ruler
  28. 28.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
  29. 29.True or false: a ruler is not needed for the pendulum. (a) False (b) True
  30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a ruler (d) a mirror
  31. 31.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
  32. 32.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
  33. 33.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a pencil and tape (c) a string (d) a battery cell
  34. 34.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
  35. 35.True or false: a balloon is needed for the pendulum. (a) False (b) True
  36. 36.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
  37. 37.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) stopped (d) quicker
  38. 38.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a longer string (d) a lighter bob
  39. 39.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
  40. 40.⚖️ 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

Answer key

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

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