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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 821 · 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.🛟 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
  2. 2.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a sundial (d) a grandfather clock
  3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a string (c) a pencil and tape (d) a stopwatch
  4. 4.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
  5. 5.True or false: a string is needed for the pendulum. (a) True (b) False
  6. 6.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
  7. 7.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
  8. 8.⚖️ 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
  9. 9.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
  10. 10.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 18 seconds?
  11. 11.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
  12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we change it (c) we keep it the same
  13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a heavy nut or washer (c) a ruler (d) a string
  14. 14.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) the wind (d) gravity
  15. 15.🔮 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
  16. 16.True or false: a magnet is not needed for the pendulum. (a) False (b) True
  17. 17.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
  18. 18.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
  19. 19.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
  20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) time for 10 swings (c) the weight of the bob (d) the string length
  21. 21.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) the bob could hit you (d) it is wet
  22. 22.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 12 seconds?
  23. 23.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a lighter bob (d) a shorter string
  24. 24.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
  25. 25.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
  26. 26.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
  27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) True (b) False
  28. 28.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it doubles (d) it halves
  29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a stopwatch (d) a mirror
  30. 30.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 60 seconds?
  31. 31.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 39 seconds?
  32. 32.True or false: yeast is not needed for the pendulum. (a) False (b) True
  33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) time for 10 swings (c) the string length (d) the same hook
  34. 34.True or false: a string is not needed for the pendulum. (a) False (b) True
  35. 35.True or false: a balloon is needed for the pendulum. (a) False (b) True
  36. 36.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) stopped (d) slower
  37. 37.🧺 Which of these is needed for the pendulum? (a) a mirror (b) yeast (c) a balloon (d) a heavy nut or washer
  38. 38.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a battery cell (c) a ruler (d) a magnet
  39. 39.⚖️ 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 measure it (b) we change it (c) we keep it the same
  40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a ruler (d) a balloon

Answer key

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

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