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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 753 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a heavy nut or washer (d) a battery cell
  2. 2.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
  3. 3.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) much faster (d) it cannot swing
  4. 4.True or false: yeast is needed for the pendulum. (a) True (b) False
  5. 5.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
  6. 6.⚖️ 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
  7. 7.⚖️ 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) the weight of the bob (c) time for 10 swings (d) the same hook
  8. 8.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
  9. 9.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
  10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a stopwatch (d) a mirror
  11. 11.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) magnetism (d) the wind
  12. 12.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
  13. 13.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) it is hot (d) the bob could hit you
  14. 14.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
  15. 15.True or false: a magnet is needed for the pendulum. (a) False (b) True
  16. 16.True or false: a balloon is not needed for the pendulum. (a) False (b) True
  17. 17.True or false: a string is needed for the pendulum. (a) False (b) True
  18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a magnet (c) a stopwatch (d) a string
  19. 19.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
  20. 20.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a mirror (c) a magnet (d) yeast
  21. 21.True or false: a balloon is needed for the pendulum. (a) True (b) False
  22. 22.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
  23. 23.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 30 seconds?
  24. 24.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it doubles (c) it becomes 4 times (d) it halves
  25. 25.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a small nut or washer (d) a heavy brick
  26. 26.⚖️ 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
  27. 27.True or false: a string is not needed for the pendulum. (a) False (b) True
  28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a stopwatch (c) a string (d) a heavy nut or washer
  29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the same hook (c) time for 10 swings
  30. 30.True or false: a battery cell is needed for the pendulum. (a) True (b) False
  31. 31.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a magnet (c) a heavy nut or washer (d) a stopwatch
  32. 32.🕰️ 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
  33. 33.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a lighter bob (d) a longer string
  34. 34.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a stopwatch (d) a mirror
  35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
  36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we measure it (c) we change it
  37. 37.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
  38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) False (b) True
  39. 39.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a digital watch (d) a sundial
  40. 40.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a heavy nut or washer (d) a battery cell

Answer key

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

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