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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 202 · 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.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
  2. 2.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 36 seconds?
  3. 3.⚖️ 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) the weight of the bob (d) the same hook
  4. 4.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a ruler (c) a mirror (d) a string
  5. 5.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a magnet (d) a heavy nut or washer
  6. 6.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) it is magnetic (d) the bob could hit you
  7. 7.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
  8. 8.⚖️ 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
  9. 9.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
  10. 10.True or false: a mirror is not needed for the pendulum. (a) False (b) True
  11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a string (c) a pencil and tape (d) a stopwatch
  12. 12.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a lighter bob (d) a longer string
  13. 13.True or false: a balloon is needed for the pendulum. (a) False (b) True
  14. 14.🔮 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
  15. 15.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
  16. 16.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a small nut or washer (d) a glass bottle
  17. 17.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
  18. 18.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a balloon (c) a stopwatch (d) a heavy nut or washer
  19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) True (b) False
  20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) yeast (c) a stopwatch (d) a heavy nut or washer
  21. 21.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) the string (d) gravity
  22. 22.⚖️ 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
  23. 23.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
  24. 24.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
  25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we measure it (c) we keep it the same
  26. 26.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
  27. 27.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) 10 is a lucky number (c) it is more fun (d) one swing is too slow
  28. 28.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
  29. 29.⚖️ 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
  30. 30.True or false: yeast is needed for the pendulum. (a) False (b) True
  31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a ruler (d) a battery cell
  32. 32.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 30 seconds?
  33. 33.🔮 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
  34. 34.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
  35. 35.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a sundial (d) a phone
  36. 36.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
  37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a magnet (c) a heavy nut or washer (d) a string
  38. 38.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
  39. 39.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) turmeric powder (d) a stopwatch
  40. 40.True or false: turmeric powder is needed for the pendulum. (a) True (b) False

Answer key

  1. not needed
  2. 12
  3. the string length
  4. a mirror
  5. a magnet
  6. the bob could hit you
  7. not needed
  8. True
  9. False
  10. True
  11. a balloon
  12. a longer string
  13. False
  14. about the same
  15. 6
  16. a small nut or washer
  17. not needed
  18. a balloon
  19. False
  20. yeast
  21. gravity
  22. time for 10 swings
  23. 16
  24. 1
  25. we keep it the same
  26. needed
  27. it is more accurate
  28. 5
  29. True
  30. False
  31. a battery cell
  32. 15
  33. it doubles
  34. not needed
  35. a grandfather clock
  36. not needed
  37. a magnet
  38. 5
  39. a stopwatch
  40. False

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