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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 487 · 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.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we keep it the same (c) we measure it
  2. 2.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
  3. 3.⚖️ 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
  4. 4.True or false: a ruler is not needed for the pendulum. (a) False (b) True
  5. 5.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a stopwatch (c) a mirror (d) yeast
  6. 6.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
  7. 7.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a heavy brick (d) a small nut or washer
  8. 8.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) the wind (d) magnetism
  9. 9.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
  10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) False (b) True
  11. 11.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?
  12. 12.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it stays the same (c) it halves (d) it becomes 4 times
  13. 13.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
  14. 14.True or false: yeast is needed for the pendulum. (a) False (b) True
  15. 15.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
  16. 16.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
  17. 17.⚖️ 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 measure it (c) we keep it the same
  18. 18.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) yeast (d) a pencil and tape
  19. 19.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
  20. 20.⚖️ 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) True (b) False
  21. 21.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) no, hardly at all (d) yes, much faster
  22. 22.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much faster (c) it cannot swing (d) much slower
  23. 23.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
  24. 24.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
  25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) how far we pull it back (c) time for 10 swings (d) the same hook
  26. 26.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 12 seconds?
  27. 27.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
  28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a string (d) turmeric powder
  29. 29.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a heavy nut or washer (d) a magnet
  30. 30.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a battery cell (c) a heavy nut or washer (d) turmeric powder
  31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the same hook (c) time for 10 swings
  32. 32.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
  33. 33.True or false: a string is needed for the pendulum. (a) True (b) False
  34. 34.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
  35. 35.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
  36. 36.⚖️ 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) the weight of the bob (d) time for 10 swings
  37. 37.⚖️ 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
  38. 38.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
  39. 39.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?
  40. 40.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) 10 is a lucky number (c) it is more fun (d) it is more accurate

Answer key

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

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