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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 237 · 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 magnet for the pendulum? (a) not needed (b) needed
  2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we keep it the same (c) we measure it
  3. 3.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a heavy brick (d) a glass bottle
  4. 4.🕰️ A pendulum makes 10 swings in 30 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: time for 10 swings is what we measure. (a) True (b) False
  6. 6.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) it cannot swing (c) much faster (d) about the same
  7. 7.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
  8. 8.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it halves (d) it stays the same
  9. 9.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
  10. 10.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a shorter string (c) a lighter bob (d) a heavier bob
  11. 11.True or false: a ruler is not needed for the pendulum. (a) False (b) True
  12. 12.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) yes, much faster (d) it stops swinging
  13. 13.True or false: a balloon is not needed for the pendulum. (a) False (b) True
  14. 14.True or false: a mirror is not needed for the pendulum. (a) False (b) True
  15. 15.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
  16. 16.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) heavier (d) quicker
  17. 17.⚖️ 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) the weight of the bob (c) the string length (d) time for 10 swings
  18. 18.True or false: a balloon is needed for the pendulum. (a) False (b) True
  19. 19.True or false: a string is needed for the pendulum. (a) True (b) False
  20. 20.⚖️ 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
  21. 21.🛟 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
  22. 22.⚖️ 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
  23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is kept the same. (a) False (b) True
  24. 24.⚖️ 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) False (b) True
  25. 25.⚖️ 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) True (b) False
  26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) turmeric powder (c) a pencil and tape (d) a stopwatch
  27. 27.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
  28. 28.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
  29. 29.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) turmeric powder (d) a pencil and tape
  30. 30.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
  31. 31.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
  32. 32.True or false: a magnet is not needed for the pendulum. (a) True (b) False
  33. 33.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a string (d) a magnet
  34. 34.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
  35. 35.⚖️ 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
  36. 36.True or false: yeast is needed for the pendulum. (a) True (b) False
  37. 37.⚖️ 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) False (b) True
  38. 38.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
  39. 39.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 18 seconds?
  40. 40.⚖️ 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) False (b) True

Answer key

  1. not needed
  2. we measure it
  3. a small nut or washer
  4. 3
  5. True
  6. about the same
  7. not needed
  8. it doubles
  9. 4
  10. a longer string
  11. False
  12. no, hardly at all
  13. True
  14. True
  15. False
  16. quicker
  17. the string length
  18. False
  19. True
  20. we change it
  21. the bob could hit you
  22. True
  23. True
  24. False
  25. False
  26. turmeric powder
  27. False
  28. needed
  29. turmeric powder
  30. 1
  31. not needed
  32. True
  33. a magnet
  34. False
  35. we keep it the same
  36. False
  37. False
  38. needed
  39. 6
  40. True

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