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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 710 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 13 seconds?
  2. 2.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) a balloon (d) a pencil and tape
  3. 3.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a phone (c) a sundial (d) a digital watch
  4. 4.True or false: yeast is not needed for the pendulum. (a) True (b) False
  5. 5.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
  6. 6.⚖️ 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) True (b) False
  7. 7.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a pencil and tape (c) a magnet (d) yeast
  8. 8.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
  9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the weight of the bob (c) how far we pull it back (d) time for 10 swings
  10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the weight of the bob
  11. 11.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) it stops swinging (d) yes, much slower
  12. 12.⚖️ 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) the string length (c) how far we pull it back (d) the same hook
  13. 13.⚖️ 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
  14. 14.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a shorter string (d) a longer string
  15. 15.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
  16. 16.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the string (d) the wind
  17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a magnet (c) a string (d) a heavy nut or washer
  18. 18.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) 10 is a lucky number (d) it is more accurate
  19. 19.True or false: a string is needed for the pendulum. (a) True (b) False
  20. 20.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a string (d) a balloon
  21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
  22. 22.True or false: a battery cell is needed for the pendulum. (a) True (b) False
  23. 23.True or false: a balloon is not needed for the pendulum. (a) False (b) True
  24. 24.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) it is wet (d) the bob could hit you
  25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a heavy nut or washer (d) a balloon
  26. 26.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
  27. 27.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
  28. 28.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
  29. 29.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
  30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a mirror (c) a ruler (d) a stopwatch
  31. 31.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) stopped (c) heavier (d) slower
  32. 32.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
  33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a ruler (c) a heavy nut or washer (d) a pencil and tape
  34. 34.True or false: a magnet is needed for the pendulum. (a) False (b) True
  35. 35.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
  36. 36.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a small nut or washer (d) a sharp tool
  37. 37.⚖️ 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 keep it the same (b) we change it (c) we measure it
  38. 38.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
  39. 39.True or false: a mirror is needed for the pendulum. (a) False (b) True
  40. 40.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed

Answer key

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

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