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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 173 · 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.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a magnet (d) a heavy nut or washer
  2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) False (b) True
  3. 3.🛟 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
  4. 4.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a heavy brick (c) a sharp tool (d) a glass bottle
  5. 5.⚖️ 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) False (b) True
  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.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
  8. 8.⚖️ 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) the same hook (c) time for 10 swings (d) how far we pull it back
  9. 9.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
  10. 10.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
  11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a mirror (c) a string (d) a stopwatch
  12. 12.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
  13. 13.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
  14. 14.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
  15. 15.True or false: a battery cell is needed for the pendulum. (a) True (b) False
  16. 16.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a balloon (c) a mirror (d) a battery cell
  17. 17.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a longer string (d) a lighter bob
  18. 18.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a string (d) yeast
  19. 19.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) turmeric powder (c) a ruler (d) a string
  20. 20.⚖️ 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 change it (c) we keep it the same
  21. 21.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 24 seconds?
  22. 22.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) about the same (d) it cannot swing
  23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) the string length (c) time for 10 swings
  24. 24.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
  25. 25.⚖️ 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
  26. 26.True or false: a balloon is not needed for the pendulum. (a) False (b) True
  27. 27.True or false: a string is needed for the pendulum. (a) True (b) False
  28. 28.⚖️ 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
  29. 29.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a balloon (c) a mirror (d) a heavy nut or washer
  30. 30.True or false: a mirror is needed for the pendulum. (a) False (b) True
  31. 31.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 48 seconds?
  32. 32.⚖️ 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
  33. 33.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
  34. 34.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 11 seconds?
  35. 35.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
  36. 36.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
  37. 37.🕰️ 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) it is more fun (d) one swing is too slow
  38. 38.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
  39. 39.🧺 Which of these is needed for the pendulum? (a) a ruler (b) yeast (c) turmeric powder (d) a magnet
  40. 40.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed

Answer key

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

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