Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 672 · 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) much faster (c) it cannot swing (d) about the same
2. 2.True or false: a string is not needed for the pendulum. (a) False (b) True
3. 3.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
4. 4.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
5. 5.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 18 seconds?
6. 6.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) quicker (d) heavier
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) yeast (d) a stopwatch
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) the string length (c) time for 10 swings (d) how far we pull it back
9. 9.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) turmeric powder (c) a heavy nut or washer (d) a string
10. 10.⚖️ 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
11. 11.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is magnetic (c) it is wet (d) it is hot
12. 12.⚖️ 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
13. 13.True or false: a battery cell is needed for the pendulum. (a) False (b) True
14. 14.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) gravity (d) the wind
15. 15.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
16. 16.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a sharp tool (d) a heavy brick
17. 17.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a lighter bob (d) a shorter string
18. 18.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
19. 19.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
20. 20.⚖️ 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
21. 21.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) it stops swinging (c) yes, much faster (d) yes, much slower
22. 22.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
23. 23.True or false: a magnet is needed for the pendulum. (a) True (b) False
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a balloon (c) a stopwatch (d) a ruler
25. 25.⚖️ 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
26. 26.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a phone (d) a digital watch
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) the same hook
28. 28.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) a heavy nut or washer (d) a mirror
29. 29.⚖️ 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) True (b) False
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) False (b) True
31. 31.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) yeast (c) a heavy nut or washer (d) a string
32. 32.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it becomes 4 times (d) it stays the same
33. 33.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
34. 34.True or false: a mirror is needed for the pendulum. (a) False (b) True
35. 35.⚖️ 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
36. 36.⚖️ 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) 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) False (b) True
38. 38.⚖️ 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 keep it the same (c) we measure it
39. 39.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) False (b) True

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