Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 972 · 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.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) a balloon (d) a pencil and tape
2. 2.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it becomes 4 times (c) it halves (d) it stays the same
3. 3.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a heavy brick (d) a sharp tool
4. 4.True or false: a ruler is not needed for the pendulum. (a) False (b) True
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we change it (c) we keep it the same
6. 6.🧺 Which of these is needed for the pendulum? (a) a string (b) turmeric powder (c) a magnet (d) a balloon
7. 7.True or false: a mirror is not needed for the pendulum. (a) False (b) True
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a string (d) a mirror
9. 9.🕰️ 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
10. 10.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
11. 11.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) turmeric powder (c) a balloon (d) a magnet
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) the same hook (c) time for 10 swings (d) the string length
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.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
15. 15.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a stopwatch (d) yeast
16. 16.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
17. 17.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a pencil and tape (c) a battery cell (d) a balloon
18. 18.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
19. 19.⚖️ 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
20. 20.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
21. 21.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) stopped (d) quicker
22. 22.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is hot (d) it is wet
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
24. 24.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a lighter bob (d) a longer string
25. 25.True or false: a balloon is not needed for the pendulum. (a) True (b) False
26. 26.True or false: yeast is needed for the pendulum. (a) True (b) False
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the weight of the bob
28. 28.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
29. 29.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
30. 30.🧺 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 battery cell
31. 31.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the string (c) magnetism (d) the wind
32. 32.⚖️ 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 change it (c) we keep it the same
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we change it (c) we keep it the same
34. 34.True or false: a string is not needed for the pendulum. (a) False (b) True
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a heavy nut or washer (c) a ruler (d) a string
36. 36.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) about the same (c) much slower (d) much faster
37. 37.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a ruler (c) a stopwatch (d) a heavy nut or washer
38. 38.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
39. 39.🕰️ 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
40. 40.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True

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