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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 189 · 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.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
  2. 2.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?
  3. 3.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
  4. 4.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) yeast (c) a battery cell (d) a mirror
  5. 5.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
  6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we change it (c) we measure it
  7. 7.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is magnetic (d) it is hot
  8. 8.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
  9. 9.🛟 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
  10. 10.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
  11. 11.True or false: yeast is not needed for the pendulum. (a) False (b) True
  12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we measure it (c) we change it
  13. 13.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a grandfather clock (d) a sundial
  14. 14.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a string (d) a mirror
  15. 15.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) turmeric powder (d) a ruler
  16. 16.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a shorter string (d) a longer string
  17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a stopwatch (d) a battery cell
  18. 18.⚖️ 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) True (b) False
  19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a balloon (c) a string (d) a stopwatch
  20. 20.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a mirror (d) a pencil and tape
  21. 21.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it halves (d) it doubles
  22. 22.⚖️ 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
  23. 23.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
  24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we keep it the same (c) we change it
  25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) the same hook (c) time for 10 swings (d) the string length
  26. 26.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
  27. 27.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
  28. 28.True or false: yeast is needed for the pendulum. (a) False (b) True
  29. 29.True or false: a string is not needed for the pendulum. (a) False (b) True
  30. 30.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
  31. 31.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
  32. 32.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) no, hardly at all (c) yes, much slower (d) it stops swinging
  33. 33.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
  34. 34.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a balloon (d) a ruler
  35. 35.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
  36. 36.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 10 seconds?
  37. 37.⚖️ 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 weight of the bob (c) time for 10 swings
  38. 38.True or false: a string is needed for the pendulum. (a) True (b) False
  39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a mirror (c) a heavy nut or washer (d) a stopwatch
  40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the same hook (c) the string length

Answer key

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

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