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Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 666 · 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.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a small nut or washer (d) a heavy brick
  2. 2.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
  3. 3.True or false: a ruler is not needed for the pendulum. (a) False (b) True
  4. 4.True or false: yeast is needed for the pendulum. (a) True (b) False
  5. 5.⚖️ 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) True (b) False
  6. 6.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 10 seconds?
  7. 7.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) gravity (d) the wind
  8. 8.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
  9. 9.True or false: a mirror is not needed for the pendulum. (a) True (b) False
  10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a ruler (d) a mirror
  11. 11.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a string (d) yeast
  12. 12.⚖️ 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 keep it the same (b) we measure it (c) we change it
  13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a balloon (d) a stopwatch
  14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a heavy nut or washer (d) yeast
  15. 15.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) a stopwatch (d) a balloon
  16. 16.⚖️ 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 same hook (c) the weight of the bob (d) the string length
  17. 17.🧺 Which of these is needed for the pendulum? (a) a string (b) a magnet (c) turmeric powder (d) yeast
  18. 18.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
  19. 19.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
  20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a magnet (d) a stopwatch
  21. 21.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
  22. 22.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) stopped (d) quicker
  23. 23.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
  24. 24.True or false: a battery cell is needed for the pendulum. (a) False (b) True
  25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) the string length (c) time for 10 swings
  26. 26.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
  27. 27.⚖️ 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) True (b) False
  28. 28.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
  29. 29.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a stopwatch (d) a mirror
  30. 30.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
  31. 31.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a phone (d) a sundial
  32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we measure it (c) we change it
  33. 33.True or false: a ruler is needed for the pendulum. (a) False (b) True
  34. 34.🛟 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
  35. 35.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
  36. 36.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it doubles (d) it halves
  37. 37.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
  38. 38.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
  39. 39.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
  40. 40.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?

Answer key

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

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