Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 414 · 40 questions

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.

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

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