Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 622 · 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.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
2. 2.⚖️ 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
3. 3.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
4. 4.⚖️ 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
5. 5.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a heavy nut or washer (c) a magnet (d) a battery cell
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a heavy nut or washer (d) a mirror
7. 7.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) yeast (c) a stopwatch (d) a mirror
8. 8.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is hot (d) it is magnetic
9. 9.⚖️ 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 change it (c) we measure it
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a heavy nut or washer (d) a balloon
11. 11.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
12. 12.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) gravity (d) the string
13. 13.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a ruler (d) yeast
15. 15.🔮 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
16. 16.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 18 seconds?
17. 17.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
18. 18.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a stopwatch (d) a magnet
19. 19.🔮 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
20. 20.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
21. 21.⚖️ 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 same hook (c) time for 10 swings (d) the weight of the bob
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) the string length (c) the weight of the bob (d) time for 10 swings
23. 23.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) it is more accurate (d) 10 is a lucky number
24. 24.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 32 seconds?
25. 25.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a ruler (d) yeast
26. 26.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
27. 27.⚖️ 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) the string length (c) time for 10 swings
28. 28.True or false: a balloon is not needed for the pendulum. (a) False (b) True
29. 29.True or false: a ruler is needed for the pendulum. (a) True (b) False
30. 30.⚖️ 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
31. 31.True or false: yeast is needed for the pendulum. (a) False (b) True
32. 32.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
33. 33.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a ruler (c) a string (d) a heavy nut or washer
34. 34.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
35. 35.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) yes, much slower (d) no, hardly at all
36. 36.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a digital watch (d) a grandfather clock
37. 37.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
38. 38.⚖️ 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
39. 39.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a magnet (c) yeast (d) a balloon
40. 40.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False

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