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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 840 · 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.🛟 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
  2. 2.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
  3. 3.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a small nut or washer (d) a heavy brick
  4. 4.True or false: yeast is not needed for the pendulum. (a) False (b) True
  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: the same hook is the one thing we change. (a) True (b) False
  7. 7.⚖️ 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 same hook (c) the string length
  8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a stopwatch (d) a magnet
  9. 9.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a digital watch (d) a grandfather clock
  10. 10.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
  11. 11.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a ruler (d) a battery cell
  12. 12.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
  13. 13.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
  14. 14.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
  15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we change it (c) we keep it the same
  16. 16.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a heavier bob (d) a longer string
  17. 17.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much slower (c) much faster (d) it cannot swing
  18. 18.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) the wind (d) magnetism
  19. 19.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
  20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a balloon (c) a ruler (d) a string
  21. 21.True or false: a ruler is not needed for the pendulum. (a) False (b) True
  22. 22.🕰️ 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
  23. 23.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a string (c) a mirror (d) yeast
  24. 24.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) turmeric powder (c) a string (d) a ruler
  25. 25.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a battery cell (d) a pencil and tape
  26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
  27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
  28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a stopwatch (d) a battery cell
  29. 29.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
  30. 30.⚖️ 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 measure it (c) we change it
  31. 31.True or false: a balloon is not needed for the pendulum. (a) True (b) False
  32. 32.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
  33. 33.True or false: a string is not needed for the pendulum. (a) False (b) True
  34. 34.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
  35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we change it (c) we keep it the same
  36. 36.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 10 seconds?
  37. 37.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
  38. 38.⚖️ 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
  39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a string (c) a heavy nut or washer (d) a pencil and tape
  40. 40.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a magnet (d) a stopwatch

Answer key

  1. the bob could hit you
  2. 1
  3. a small nut or washer
  4. True
  5. 1
  6. False
  7. the same hook
  8. a magnet
  9. a grandfather clock
  10. 2
  11. a ruler
  12. needed
  13. not needed
  14. not needed
  15. we measure it
  16. a longer string
  17. about the same
  18. gravity
  19. not needed
  20. a balloon
  21. False
  22. no, hardly at all
  23. a string
  24. turmeric powder
  25. a battery cell
  26. False
  27. True
  28. a battery cell
  29. 1
  30. we change it
  31. True
  32. True
  33. False
  34. needed
  35. we keep it the same
  36. 5
  37. False
  38. we keep it the same
  39. yeast
  40. a magnet

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