Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 60 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a pencil and tape (c) a stopwatch (d) a ruler
2. 2.True or false: a magnet is not needed for the pendulum. (a) True (b) False
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we keep it the same (c) we measure it
4. 4.True or false: a mirror 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.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) a ruler (d) a pencil and tape
7. 7.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) a battery cell (d) a string
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
9. 9.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
10. 10.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a stopwatch (c) a battery cell (d) a magnet
11. 11.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is wet (d) it is magnetic
12. 12.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) gravity (d) the string
13. 13.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a pencil and tape (c) a stopwatch (d) a ruler
15. 15.True or false: a balloon is needed for the pendulum. (a) True (b) False
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
17. 17.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it doubles (c) it becomes 4 times (d) it halves
18. 18.⚖️ 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) True (b) False
19. 19.🧺 Which of these is needed for the pendulum? (a) yeast (b) a battery cell (c) a magnet (d) a string
20. 20.⚖️ 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 keep it the same (c) we change it
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) time for 10 swings (c) the weight of the bob (d) the string length
22. 22.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a phone (d) a digital watch
23. 23.True or false: yeast 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 stopwatch (b) a pencil and tape (c) a ruler (d) a battery cell
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the string length (c) the weight of the bob (d) how far we pull it back
28. 28.⚖️ 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
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a ruler (c) a stopwatch (d) a string
30. 30.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) False (b) True
32. 32.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a heavy brick (d) a glass bottle
33. 33.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) heavier (d) stopped
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
35. 35.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a magnet (c) a ruler (d) a string
37. 37.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
38. 38.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
39. 39.⚖️ 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 keep it the same (b) we change it (c) we measure it
40. 40.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a pencil and tape (d) yeast

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