← Simple pendulum timing lesson New set →

Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 828 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) heavier (d) quicker
  2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) time for 10 swings (c) the weight of the bob (d) the same hook
  3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a balloon (d) a pencil and tape
  4. 4.🛟 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
  5. 5.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a heavier bob (d) a lighter bob
  6. 6.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more accurate (c) one swing is too slow (d) it is more fun
  7. 7.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
  8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a mirror (c) a string (d) a stopwatch
  9. 9.True or false: a magnet is not needed for the pendulum. (a) True (b) False
  10. 10.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
  11. 11.⚖️ 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 string length (c) time for 10 swings (d) the same hook
  12. 12.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) much faster (d) about the same
  13. 13.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
  14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we measure it (c) we keep it the same
  15. 15.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
  16. 16.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a sharp tool (d) a heavy brick
  17. 17.⚖️ 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
  18. 18.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
  19. 19.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
  20. 20.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
  21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
  22. 22.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
  23. 23.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
  24. 24.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
  25. 25.🧺 Which of these is needed for the pendulum? (a) yeast (b) a pencil and tape (c) a balloon (d) a magnet
  26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is kept the same. (a) True (b) False
  27. 27.True or false: a string is needed for the pendulum. (a) True (b) False
  28. 28.⚖️ 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
  29. 29.True or false: a string is not needed for the pendulum. (a) True (b) False
  30. 30.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
  31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we keep it the same (c) we change it
  32. 32.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a stopwatch (d) a magnet
  33. 33.🔮 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 halves (d) it doubles
  34. 34.True or false: yeast is needed for the pendulum. (a) False (b) True
  35. 35.True or false: yeast is not needed for the pendulum. (a) True (b) False
  36. 36.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
  37. 37.⚖️ 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) False (b) True
  38. 38.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) yeast (c) a heavy nut or washer (d) a battery cell
  39. 39.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a ruler (d) yeast
  40. 40.True or false: a mirror is needed for the pendulum. (a) True (b) False

Answer key

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

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids