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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 593 · 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 mirror (b) a string (c) a pencil and tape (d) a ruler
  2. 2.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
  3. 3.⚖️ 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
  4. 4.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more accurate (c) 10 is a lucky number (d) it is more fun
  5. 5.True or false: a mirror is not needed for the pendulum. (a) False (b) True
  6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a stopwatch (d) a battery cell
  7. 7.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a stopwatch (d) turmeric powder
  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 same hook (b) how far we pull it back (c) time for 10 swings (d) the string length
  9. 9.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
  10. 10.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
  11. 11.🛟 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
  12. 12.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
  13. 13.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the wind (d) the string
  14. 14.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
  15. 15.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
  16. 16.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
  17. 17.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
  18. 18.🧺 Which of these is not needed for the pendulum? (a) a string (b) a magnet (c) a pencil and tape (d) a ruler
  19. 19.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 26 seconds?
  20. 20.⚖️ 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 measure it (b) we change it (c) we keep it the same
  21. 21.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) a pencil and tape (d) a battery cell
  22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
  23. 23.⚖️ 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
  24. 24.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
  25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) yeast (d) a string
  26. 26.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
  27. 27.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
  28. 28.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
  29. 29.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) it is hot (d) the bob could hit you
  30. 30.⚖️ 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) True (b) False
  31. 31.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
  32. 32.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a pencil and tape (c) a balloon (d) turmeric powder
  33. 33.⚖️ 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
  34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the same hook (c) time for 10 swings (d) how far we pull it back
  35. 35.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 36 seconds?
  36. 36.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
  37. 37.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
  38. 38.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a ruler (c) a pencil and tape (d) a heavy nut or washer
  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 change it (c) we measure it
  40. 40.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?

Answer key

  1. a mirror
  2. False
  3. False
  4. it is more accurate
  5. True
  6. a battery cell
  7. turmeric powder
  8. the string length
  9. 2
  10. 1
  11. a small nut or washer
  12. not needed
  13. gravity
  14. not needed
  15. not needed
  16. 3
  17. needed
  18. a magnet
  19. 13
  20. we keep it the same
  21. a battery cell
  22. False
  23. True
  24. not needed
  25. yeast
  26. needed
  27. 2
  28. needed
  29. the bob could hit you
  30. True
  31. False
  32. a pencil and tape
  33. the same hook
  34. time for 10 swings
  35. 12
  36. not needed
  37. a grandfather clock
  38. a mirror
  39. we keep it the same
  40. 15

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