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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 304 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a stopwatch (d) turmeric powder
  2. 2.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
  3. 3.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it doubles (d) it stays the same
  4. 4.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
  5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we change it (c) we measure it
  6. 6.🛟 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
  7. 7.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) yeast (c) a balloon (d) a string
  8. 8.🔮 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
  9. 9.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
  10. 10.⚖️ 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 measure it (c) we change it
  11. 11.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a sundial (d) a phone
  12. 12.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
  13. 13.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
  14. 14.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the string (c) the wind (d) magnetism
  15. 15.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
  16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a pencil and tape (d) a magnet
  17. 17.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
  18. 18.True or false: yeast is needed for the pendulum. (a) True (b) False
  19. 19.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
  20. 20.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) the bob could hit you (d) it is hot
  21. 21.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a lighter bob (d) a heavier bob
  22. 22.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
  23. 23.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
  24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the string length (c) how far we pull it back (d) the same hook
  25. 25.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
  26. 26.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
  27. 27.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
  28. 28.⚖️ 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 keep it the same (c) we change it
  29. 29.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
  30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a balloon (c) a ruler (d) a string
  31. 31.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
  32. 32.⚖️ 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
  33. 33.⚖️ 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) time for 10 swings (c) the string length (d) how far we pull it back
  34. 34.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much slower (c) yes, much faster (d) it stops swinging
  35. 35.⚖️ 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) False (b) True
  36. 36.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) quicker (d) stopped
  37. 37.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a magnet (c) turmeric powder (d) a ruler
  38. 38.🧺 Which of these is needed for the pendulum? (a) yeast (b) turmeric powder (c) a magnet (d) a pencil and tape
  39. 39.⚖️ 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
  40. 40.🧺 Do we need a string for the pendulum? (a) needed (b) not needed

Answer key

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

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