Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 892 · 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.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) one swing is too slow (c) it is more fun (d) 10 is a lucky number
2. 2.⚖️ 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
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a string (c) a heavy nut or washer (d) a pencil and tape
4. 4.⚖️ 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
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a ruler (c) a heavy nut or washer (d) a string
6. 6.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?
7. 7.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) the wind (d) gravity
8. 8.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a mirror (c) a battery cell (d) yeast
9. 9.⚖️ 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
10. 10.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) it is magnetic (d) the bob could hit you
11. 11.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a mirror (c) a string (d) a heavy nut or washer
12. 12.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a longer string (d) a heavier bob
13. 13.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a battery cell (d) a pencil and tape
14. 14.True or false: a ruler is not needed for the pendulum. (a) True (b) False
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a pencil and tape (d) yeast
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) time for 10 swings (c) the same hook (d) how far we pull it back
17. 17.⚖️ 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
18. 18.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) heavier (d) quicker
19. 19.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
20. 20.🛟 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
21. 21.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) yeast (c) a pencil and tape (d) a string
22. 22.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
23. 23.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
24. 24.⚖️ 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
25. 25.⚖️ 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
26. 26.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it stays the same (d) it becomes 4 times
27. 27.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
28. 28.⚖️ 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 same hook (c) the string length (d) the weight of the bob
29. 29.⚖️ 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
30. 30.⚖️ 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
31. 31.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a pencil and tape (d) a mirror
32. 32.True or false: a ruler is needed for the pendulum. (a) False (b) True
33. 33.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a heavy nut or washer (c) turmeric powder (d) a balloon
34. 34.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a balloon (d) a heavy nut or washer
35. 35.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) about the same (d) much slower
36. 36.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
37. 37.⚖️ 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
38. 38.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
39. 39.⚖️ 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) True (b) False
40. 40.⚖️ 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) False (b) True

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