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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 852 · 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.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
  2. 2.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a shorter string (d) a longer string
  3. 3.🧺 Which of these is needed for the pendulum? (a) yeast (b) a battery cell (c) a ruler (d) turmeric powder
  4. 4.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a heavy brick (c) a glass bottle (d) a sharp tool
  5. 5.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
  6. 6.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) it is more accurate (d) one swing is too slow
  7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a ruler (d) a magnet
  8. 8.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
  9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) turmeric powder (d) a string
  10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
  11. 11.⚖️ 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) time for 10 swings (c) the same hook (d) the weight of the bob
  12. 12.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a grandfather clock (d) a digital watch
  13. 13.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
  14. 14.True or false: a balloon is needed for the pendulum. (a) True (b) False
  15. 15.🔮 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
  16. 16.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
  17. 17.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
  18. 18.True or false: a string is needed for the pendulum. (a) False (b) True
  19. 19.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
  20. 20.True or false: a magnet is not needed for the pendulum. (a) False (b) True
  21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
  22. 22.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is hot (d) it is magnetic
  23. 23.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
  24. 24.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
  25. 25.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a pencil and tape (c) a ruler (d) a stopwatch
  26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the string length (c) how far we pull it back
  27. 27.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
  28. 28.True or false: a magnet is needed for the pendulum. (a) True (b) False
  29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a balloon (d) a heavy nut or washer
  30. 30.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
  31. 31.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a mirror (c) a magnet (d) a heavy nut or washer
  32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a ruler (c) a heavy nut or washer (d) a string
  33. 33.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
  34. 34.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
  35. 35.🔮 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 stays the same (d) it halves
  36. 36.True or false: a ruler is not needed for the pendulum. (a) True (b) False
  37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) yeast (c) a stopwatch (d) a string
  38. 38.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
  39. 39.⚖️ 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
  40. 40.⚖️ 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

Answer key

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

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