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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 251 · 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.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
  2. 2.🕰️ A pendulum makes 20 swings in 40 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) it cannot swing (b) much slower (c) about the same (d) much faster
  4. 4.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
  5. 5.⚖️ 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) the string length (c) how far we pull it back (d) time for 10 swings
  6. 6.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
  7. 7.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
  8. 8.⚖️ 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
  9. 9.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a glass bottle (d) a small nut or washer
  10. 10.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a pencil and tape (d) a mirror
  11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) yeast (c) a string (d) a pencil and tape
  12. 12.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a pencil and tape (d) a battery cell
  13. 13.⚖️ 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 weight of the bob (c) time for 10 swings
  14. 14.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
  15. 15.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
  16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) how far we pull it back
  17. 17.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
  18. 18.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) heavier (d) quicker
  19. 19.⚖️ 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
  20. 20.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?
  21. 21.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is wet (d) it is magnetic
  22. 22.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it stays the same (d) it doubles
  23. 23.True or false: a mirror is needed for the pendulum. (a) True (b) False
  24. 24.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) the wind (d) magnetism
  25. 25.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
  26. 26.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a phone (d) a sundial
  27. 27.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a pencil and tape (c) a heavy nut or washer (d) a string
  28. 28.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a mirror (c) a string (d) a battery cell
  29. 29.True or false: a ruler is not needed for the pendulum. (a) True (b) False
  30. 30.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
  31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
  32. 32.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
  33. 33.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 33 seconds?
  34. 34.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
  35. 35.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
  36. 36.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a balloon (c) a string (d) a stopwatch
  37. 37.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
  38. 38.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) turmeric powder (d) a stopwatch
  39. 39.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 10 seconds?
  40. 40.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a lighter bob (d) a shorter string

Answer key

  1. not needed
  2. 2
  3. about the same
  4. needed
  5. the string length
  6. True
  7. 1
  8. True
  9. a small nut or washer
  10. a mirror
  11. yeast
  12. a pencil and tape
  13. the weight of the bob
  14. not needed
  15. 7
  16. how far we pull it back
  17. False
  18. quicker
  19. we keep it the same
  20. 8
  21. the bob could hit you
  22. it doubles
  23. False
  24. gravity
  25. not needed
  26. a grandfather clock
  27. a battery cell
  28. a string
  29. False
  30. needed
  31. False
  32. needed
  33. 11
  34. not needed
  35. False
  36. a balloon
  37. 5
  38. a stopwatch
  39. 5
  40. a longer string

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