Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 781 · 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 heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) it cannot swing (c) about the same (d) much faster
2. 2.⚖️ 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) False (b) True
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the weight of the bob (c) the same hook (d) time for 10 swings
4. 4.True or false: a battery cell is needed for the pendulum. (a) True (b) False
5. 5.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) False (b) True
7. 7.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a lighter bob (d) a heavier bob
8. 8.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) a heavy nut or washer (d) a battery cell
9. 9.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) it stops swinging (d) yes, much slower
10. 10.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
11. 11.True or false: a string is not needed for the pendulum. (a) True (b) False
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is kept the same. (a) False (b) True
13. 13.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) one swing is too slow (c) it is more fun (d) it is more accurate
14. 14.⚖️ 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
15. 15.⚖️ 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
16. 16.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a magnet (d) a stopwatch
17. 17.🧺 Which of these is needed for the pendulum? (a) a string (b) a balloon (c) turmeric powder (d) a battery cell
18. 18.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a heavy brick (d) a small nut or washer
19. 19.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 24 seconds?
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a battery cell (d) a pencil and tape
21. 21.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
22. 22.True or false: a balloon is needed for the pendulum. (a) True (b) False
23. 23.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
24. 24.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a ruler (d) a balloon
25. 25.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) the bob could hit you (d) it is hot
26. 26.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
27. 27.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
28. 28.🧺 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 balloon (d) a string
29. 29.⚖️ 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
30. 30.⚖️ 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
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 string length”? (a) we measure it (b) we keep it the same (c) we change it
33. 33.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
34. 34.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a stopwatch (c) a battery cell (d) a mirror
35. 35.⚖️ 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 same hook
36. 36.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a mirror (d) a heavy nut or washer
37. 37.True or false: yeast is needed for the pendulum. (a) True (b) False
38. 38.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
39. 39.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) heavier (d) quicker
40. 40.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?

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