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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 455 · 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.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a string (d) a battery cell
  2. 2.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
  3. 3.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
  4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the same hook (c) the weight of the bob (d) time for 10 swings
  5. 5.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a pencil and tape (c) a balloon (d) a stopwatch
  6. 6.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
  7. 7.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a glass bottle (d) a heavy brick
  8. 8.⚖️ 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
  9. 9.⚖️ 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
  10. 10.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
  11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a balloon (d) a stopwatch
  12. 12.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) the wind (d) magnetism
  13. 13.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it stays the same (d) it becomes 4 times
  14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a stopwatch (d) turmeric powder
  15. 15.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
  16. 16.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
  17. 17.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 10 seconds?
  18. 18.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
  19. 19.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a lighter bob (d) a longer string
  20. 20.⚖️ 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 measure it (c) we keep it the same
  21. 21.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
  22. 22.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
  23. 23.True or false: a mirror is not needed for the pendulum. (a) False (b) True
  24. 24.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
  25. 25.🧺 Which of these is needed for the pendulum? (a) yeast (b) a ruler (c) turmeric powder (d) a magnet
  26. 26.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
  27. 27.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a balloon (c) a magnet (d) a stopwatch
  28. 28.⚖️ 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
  29. 29.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) no, hardly at all (c) yes, much slower (d) it stops swinging
  30. 30.True or false: a string is not needed for the pendulum. (a) False (b) True
  31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) False (b) True
  32. 32.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a grandfather clock (d) a digital watch
  33. 33.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
  34. 34.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) it is more accurate (c) 10 is a lucky number (d) one swing is too slow
  35. 35.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
  36. 36.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
  37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a magnet (d) a ruler
  38. 38.True or false: a string is needed for the pendulum. (a) True (b) False
  39. 39.⚖️ 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
  40. 40.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a magnet (c) a ruler (d) a string

Answer key

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

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