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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 791 · 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) gravity (c) the wind (d) the string
  2. 2.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
  3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a battery cell (c) a pencil and tape (d) a stopwatch
  4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) slower (d) heavier
  5. 5.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
  6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the string length (c) how far we pull it back (d) time for 10 swings
  7. 7.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
  8. 8.⚖️ 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) True (b) False
  9. 9.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much slower (c) it stops swinging (d) yes, much faster
  10. 10.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
  11. 11.True or false: yeast is not needed for the pendulum. (a) True (b) False
  12. 12.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a sharp tool (d) a small nut or washer
  13. 13.⚖️ 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
  14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we change it (c) we measure it
  15. 15.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a heavy nut or washer (c) a magnet (d) a mirror
  16. 16.⚖️ 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
  17. 17.True or false: a mirror is needed for the pendulum. (a) False (b) True
  18. 18.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 30 seconds?
  19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a string (d) a mirror
  20. 20.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
  21. 21.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a phone (d) a grandfather clock
  22. 22.⚖️ 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
  23. 23.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a pencil and tape (d) turmeric powder
  24. 24.True or false: a magnet is needed for the pendulum. (a) False (b) True
  25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
  26. 26.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
  27. 27.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) it cannot swing (d) about the same
  28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we keep it the same (c) we change it
  29. 29.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a battery cell (c) a magnet (d) a string
  30. 30.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) one swing is too slow (c) it is more accurate (d) it is more fun
  31. 31.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
  32. 32.True or false: a string is not needed for the pendulum. (a) False (b) True
  33. 33.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) a magnet (d) a heavy nut or washer
  34. 34.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
  35. 35.True or false: a ruler is needed for the pendulum. (a) False (b) True
  36. 36.True or false: a balloon is not needed for the pendulum. (a) False (b) True
  37. 37.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
  38. 38.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
  39. 39.True or false: a string is needed for the pendulum. (a) False (b) True
  40. 40.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?

Answer key

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

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