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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 320 · 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 stopwatch (c) a heavy nut or washer (d) a balloon
  2. 2.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
  3. 3.🛟 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
  4. 4.🧺 Which of these is needed for the pendulum? (a) a string (b) a magnet (c) a balloon (d) a battery cell
  5. 5.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
  6. 6.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
  7. 7.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much slower (d) yes, much faster
  8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a ruler (c) a pencil and tape (d) a stopwatch
  9. 9.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a heavy nut or washer (c) yeast (d) a balloon
  10. 10.🛟 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
  11. 11.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
  12. 12.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the wind (c) magnetism (d) the string
  13. 13.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 18 seconds?
  14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we keep it the same (c) we measure it
  15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the weight of the bob (c) the same hook (d) the string length
  16. 16.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) yeast (c) a pencil and tape (d) a mirror
  17. 17.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
  18. 18.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
  19. 19.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
  20. 20.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
  21. 21.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a battery cell (d) a string
  22. 22.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a stopwatch (c) a string (d) a pencil and tape
  23. 23.⚖️ 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) the weight of the bob
  24. 24.⚖️ 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) False (b) True
  25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we keep it the same (c) we measure it
  26. 26.⚖️ 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
  27. 27.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
  28. 28.True or false: a balloon is not needed for the pendulum. (a) False (b) True
  29. 29.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a stopwatch (c) a ruler (d) a string
  30. 30.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
  31. 31.⚖️ 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
  32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) False (b) True
  33. 33.True or false: a magnet is not needed for the pendulum. (a) True (b) False
  34. 34.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a digital watch (d) a grandfather clock
  35. 35.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 54 seconds?
  36. 36.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
  37. 37.True or false: a ruler is not needed for the pendulum. (a) False (b) True
  38. 38.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it doubles (d) it halves
  39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we measure it (c) we change it
  40. 40.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed

Answer key

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

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