← Simple pendulum timing lesson New set →

Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 600 · 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.⚖️ 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 string length (c) the same hook (d) time for 10 swings
  2. 2.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the string (c) magnetism (d) the wind
  3. 3.⚖️ 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
  4. 4.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
  5. 5.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
  6. 6.True or false: a battery cell is needed for the pendulum. (a) True (b) False
  7. 7.⚖️ 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
  8. 8.⚖️ 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) False (b) True
  9. 9.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
  10. 10.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
  11. 11.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) slower (d) quicker
  12. 12.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) it stops swinging (d) no, hardly at all
  13. 13.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
  14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we keep it the same (c) we measure it
  15. 15.True or false: a mirror is needed for the pendulum. (a) True (b) False
  16. 16.True or false: a mirror is not needed for the pendulum. (a) False (b) True
  17. 17.🧺 Which of these is not needed for the pendulum? (a) a string (b) a balloon (c) a heavy nut or washer (d) a ruler
  18. 18.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a magnet (c) turmeric powder (d) a battery cell
  19. 19.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a battery cell (c) yeast (d) a ruler
  20. 20.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
  21. 21.⚖️ 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
  22. 22.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a sundial (d) a phone
  23. 23.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 10 seconds?
  24. 24.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
  25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a battery cell (c) a pencil and tape (d) a string
  26. 26.True or false: a magnet is needed for the pendulum. (a) True (b) False
  27. 27.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it doubles (c) it halves (d) it becomes 4 times
  28. 28.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) 10 is a lucky number (c) it is more fun (d) one swing is too slow
  29. 29.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
  30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a magnet (d) a string
  31. 31.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
  32. 32.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) about the same (d) much slower
  33. 33.⚖️ 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
  34. 34.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is hot (d) it is magnetic
  35. 35.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 18 seconds?
  36. 36.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
  37. 37.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
  38. 38.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) turmeric powder (d) a pencil and tape
  39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
  40. 40.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a pencil and tape (c) a heavy nut or washer (d) a magnet

Answer key

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

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