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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 688 · 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.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
  2. 2.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
  3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False
  4. 4.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
  5. 5.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a small nut or washer (d) a glass bottle
  6. 6.🧺 Which of these is needed for the pendulum? (a) yeast (b) a magnet (c) a heavy nut or washer (d) a battery cell
  7. 7.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is hot (d) it is wet
  8. 8.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
  9. 9.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
  10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
  11. 11.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) stopped (d) heavier
  12. 12.🔮 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
  13. 13.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
  14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a pencil and tape (d) a balloon
  15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a stopwatch (d) a magnet
  16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the same hook (c) the weight of the bob (d) the string length
  17. 17.⚖️ 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
  18. 18.🧺 Which of these is needed for the pendulum? (a) a string (b) a balloon (c) turmeric powder (d) a magnet
  19. 19.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) yeast (c) a ruler (d) a string
  20. 20.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
  21. 21.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 22 seconds?
  22. 22.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
  23. 23.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a sundial (d) a grandfather clock
  24. 24.⚖️ 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
  25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) the same hook (c) the string length (d) how far we pull it back
  26. 26.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
  27. 27.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a ruler (d) a magnet
  28. 28.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) a ruler (d) a balloon
  29. 29.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) it stops swinging (d) yes, much faster
  30. 30.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) the string (d) magnetism
  31. 31.⚖️ 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 keep it the same (c) we change it
  32. 32.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
  33. 33.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
  34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) False (b) True
  35. 35.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
  36. 36.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a heavy nut or washer (d) a magnet
  37. 37.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) a mirror (d) a heavy nut or washer
  38. 38.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
  39. 39.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
  40. 40.True or false: a balloon is not needed for the pendulum. (a) False (b) True

Answer key

  1. needed
  2. needed
  3. False
  4. not needed
  5. a small nut or washer
  6. a heavy nut or washer
  7. the bob could hit you
  8. 2
  9. needed
  10. True
  11. quicker
  12. it doubles
  13. not needed
  14. a balloon
  15. a magnet
  16. time for 10 swings
  17. False
  18. a string
  19. yeast
  20. 1
  21. 11
  22. True
  23. a grandfather clock
  24. True
  25. the string length
  26. False
  27. a ruler
  28. a balloon
  29. no, hardly at all
  30. gravity
  31. we change it
  32. 14
  33. 1
  34. False
  35. 10
  36. a magnet
  37. a mirror
  38. needed
  39. not needed
  40. True

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