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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 899 · 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.🔮 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
  2. 2.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
  3. 3.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a phone (d) a grandfather clock
  4. 4.🕰️ A pendulum makes 20 swings in 40 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: the weight of the bob is kept the same. (a) True (b) False
  6. 6.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
  7. 7.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) the bob could hit you (d) it is wet
  8. 8.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) much faster (d) it cannot swing
  9. 9.True or false: a magnet is not needed for the pendulum. (a) False (b) True
  10. 10.⚖️ 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 keep it the same (b) we measure it (c) we change it
  11. 11.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more accurate (c) one swing is too slow (d) it is more fun
  12. 12.🛟 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
  13. 13.⚖️ 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 measure it (c) we keep it the same
  14. 14.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) quicker (d) heavier
  15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) turmeric powder (c) a ruler (d) a string
  16. 16.⚖️ 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) True (b) False
  17. 17.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
  18. 18.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a heavier bob (d) a shorter string
  19. 19.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
  20. 20.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the string (c) magnetism (d) the wind
  21. 21.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
  22. 22.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
  23. 23.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
  24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the weight of the bob (c) the same hook (d) time for 10 swings
  25. 25.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
  26. 26.⚖️ 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) how far we pull it back (c) the same hook (d) time for 10 swings
  27. 27.True or false: a mirror is not needed for the pendulum. (a) False (b) True
  28. 28.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a ruler (d) a magnet
  29. 29.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) it stops swinging (d) no, hardly at all
  30. 30.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 34 seconds?
  31. 31.True or false: a string is not needed for the pendulum. (a) True (b) False
  32. 32.⚖️ 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
  33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a mirror (d) a ruler
  34. 34.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
  35. 35.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
  36. 36.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 11 seconds?
  37. 37.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
  38. 38.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a balloon (c) a stopwatch (d) a ruler
  39. 39.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a ruler (c) a mirror (d) a magnet
  40. 40.True or false: a battery cell is not needed for the pendulum. (a) False (b) True

Answer key

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

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