Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 900 · 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 change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a lighter bob (d) a shorter string
2. 2.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much faster (c) it cannot swing (d) much slower
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
4. 4.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) the bob could hit you (d) it is wet
5. 5.⚖️ 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) True (b) False
6. 6.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 18 seconds?
7. 7.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it halves (d) it stays the same
8. 8.⚖️ 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
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we measure it (c) we keep it the same
10. 10.True or false: a balloon is not needed for the pendulum. (a) False (b) True
11. 11.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) it stops swinging (d) no, hardly at all
12. 12.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “how far we pull it back”? (a) we change it (b) we measure it (c) we keep it the same
14. 14.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) yeast (c) a heavy nut or washer (d) a mirror
15. 15.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) the wind (d) gravity
16. 16.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) 10 is a lucky number (c) it is more fun (d) it is more accurate
17. 17.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 16 seconds?
18. 18.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 39 seconds?
19. 19.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a small nut or washer (d) a glass bottle
20. 20.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
21. 21.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a pencil and tape (d) a battery cell
22. 22.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a stopwatch (c) yeast (d) a string
23. 23.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
24. 24.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
25. 25.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a magnet (c) turmeric powder (d) a ruler
26. 26.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the string length (c) how far we pull it back
28. 28.⚖️ 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 keep it the same (c) we change it
29. 29.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a magnet (c) turmeric powder (d) a stopwatch
30. 30.⚖️ 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
31. 31.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a pencil and tape (d) a magnet
32. 32.⚖️ 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) the string length (c) the same hook (d) how far we pull it back
33. 33.True or false: a ruler is needed for the pendulum. (a) False (b) True
34. 34.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a stopwatch (d) a mirror
35. 35.True or false: a balloon is needed for the pendulum. (a) True (b) False
36. 36.⚖️ 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) True (b) False
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) True (b) False
38. 38.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
39. 39.True or false: a string is needed for the pendulum. (a) True (b) False
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a balloon (d) a ruler

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