Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 923 · 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.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a glass bottle (d) a heavy brick
2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a pencil and tape (d) turmeric powder
3. 3.🧺 Which of these is not needed for the pendulum? (a) a string (b) turmeric powder (c) a heavy nut or washer (d) a stopwatch
4. 4.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 22 seconds?
5. 5.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
6. 6.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) stopped (d) quicker
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) False (b) True
8. 8.⚖️ 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) the weight of the bob (d) time for 10 swings
9. 9.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
10. 10.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a pencil and tape (c) a balloon (d) a stopwatch
11. 11.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) no, hardly at all (d) yes, much faster
12. 12.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is magnetic (d) it is hot
13. 13.⚖️ 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
14. 14.🧺 Which of these is needed for the pendulum? (a) a mirror (b) yeast (c) a magnet (d) a ruler
15. 15.⚖️ 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
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) how far we pull it back (c) the string length (d) the weight of the bob
17. 17.🔮 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
18. 18.⚖️ 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
19. 19.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
20. 20.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
21. 21.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
22. 22.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
23. 23.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
24. 24.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a grandfather clock (d) a phone
25. 25.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
26. 26.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
27. 27.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) one swing is too slow (d) it is more accurate
28. 28.True or false: a magnet is not needed for the pendulum. (a) False (b) True
29. 29.⚖️ 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
30. 30.⚖️ 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 change it (c) we measure it
31. 31.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
32. 32.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) yeast (d) a string
33. 33.True or false: a balloon is needed for the pendulum. (a) False (b) True
34. 34.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
35. 35.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
36. 36.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a stopwatch (d) yeast
38. 38.🔮 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
39. 39.🧺 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) a battery cell (d) a ruler
40. 40.True or false: a battery cell is needed for the pendulum. (a) False (b) True

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