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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 64 · 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 shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
  2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a heavy nut or washer (c) a ruler (d) a string
  3. 3.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
  4. 4.🔮 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 stays the same (d) it doubles
  5. 5.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a pencil and tape (d) a balloon
  6. 6.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
  7. 7.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a heavy brick (d) a glass bottle
  8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
  9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) time for 10 swings (c) the string length (d) the same hook
  10. 10.⚖️ 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
  11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
  12. 12.True or false: a balloon is not needed for the pendulum. (a) False (b) True
  13. 13.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much faster (c) much slower (d) it cannot swing
  14. 14.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
  15. 15.True or false: a mirror is needed for the pendulum. (a) False (b) True
  16. 16.🧺 Which of these is needed for the pendulum? (a) yeast (b) a mirror (c) a pencil and tape (d) a balloon
  17. 17.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
  18. 18.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) no, hardly at all (c) it stops swinging (d) yes, much slower
  19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a string (d) turmeric powder
  20. 20.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a longer string (d) a lighter bob
  21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a mirror (d) a heavy nut or washer
  22. 22.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
  23. 23.⚖️ 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) False (b) True
  24. 24.🧺 Which of these is needed for the pendulum? (a) a string (b) a mirror (c) a balloon (d) a battery cell
  25. 25.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
  26. 26.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
  27. 27.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) the wind (c) magnetism (d) gravity
  28. 28.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
  29. 29.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
  30. 30.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
  31. 31.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
  32. 32.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a balloon (c) turmeric powder (d) a stopwatch
  33. 33.True or false: a string is needed for the pendulum. (a) False (b) True
  34. 34.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) a battery cell (d) a ruler
  35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) time for 10 swings (c) the string length
  36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) False (b) True
  37. 37.⚖️ 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) how far we pull it back (d) the same hook
  38. 38.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a string (c) a heavy nut or washer (d) a pencil and tape
  39. 39.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 36 seconds?
  40. 40.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False

Answer key

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

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