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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 769 · 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 same hook”? (a) we keep it the same (b) we measure it (c) we change it
  2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
  3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a stopwatch (d) turmeric powder
  4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) stopped (c) slower (d) heavier
  5. 5.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
  6. 6.🔮 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
  7. 7.🧺 Which of these is needed for the pendulum? (a) a string (b) turmeric powder (c) a mirror (d) a magnet
  8. 8.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
  9. 9.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
  10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a string (d) a magnet
  11. 11.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
  12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a balloon (d) a stopwatch
  13. 13.⚖️ 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
  14. 14.True or false: a magnet is needed for the pendulum. (a) False (b) True
  15. 15.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a mirror (c) a string (d) a pencil and tape
  16. 16.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
  17. 17.🛟 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
  18. 18.🔮 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
  19. 19.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
  20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
  21. 21.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
  22. 22.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much faster (d) yes, much slower
  23. 23.⚖️ 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
  24. 24.🛟 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
  25. 25.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
  26. 26.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
  27. 27.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a pencil and tape (d) turmeric powder
  28. 28.True or false: a balloon is not needed for the pendulum. (a) False (b) True
  29. 29.⚖️ 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
  30. 30.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
  31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) yeast (c) a pencil and tape (d) a string
  32. 32.⚖️ 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
  33. 33.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) a ruler (d) a magnet
  34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (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 change it (b) we measure it (c) we keep it the same
  36. 36.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
  37. 37.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
  38. 38.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
  39. 39.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
  40. 40.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 24 seconds?

Answer key

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

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