Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 660 · 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.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🛟 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
3. 3.⚖️ 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 weight of the bob (d) the same hook
4. 4.⚖️ 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
5. 5.🧺 Which of these is not needed for the pendulum? (a) a string (b) turmeric powder (c) a pencil and tape (d) a ruler
6. 6.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a ruler (c) a battery cell (d) a heavy nut or washer
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a ruler (d) yeast
8. 8.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the string length (c) the weight of the bob (d) time for 10 swings
10. 10.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
11. 11.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
12. 12.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it doubles (d) it halves
13. 13.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a balloon (c) a battery cell (d) a stopwatch
14. 14.⚖️ 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
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a heavy nut or washer (d) a magnet
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) turmeric powder (d) a ruler
17. 17.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) the string (d) magnetism
18. 18.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
19. 19.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) much slower (d) about the same
20. 20.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a longer string (d) a lighter bob
21. 21.⚖️ 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 measure it (b) we keep it the same (c) we change it
22. 22.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) one swing is too slow (d) it is more accurate
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a heavy nut or washer (d) a mirror
24. 24.⚖️ 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) True (b) False
25. 25.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
27. 27.True or false: yeast is not needed for the pendulum. (a) True (b) False
28. 28.⚖️ 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
29. 29.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
30. 30.True or false: a ruler is needed for the pendulum. (a) True (b) False
31. 31.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 22 seconds?
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a stopwatch (c) a string (d) a heavy nut or washer
33. 33.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
34. 34.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
35. 35.⚖️ 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
36. 36.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
37. 37.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
38. 38.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) slower (d) stopped
39. 39.⚖️ 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
40. 40.True or false: turmeric powder is needed for the pendulum. (a) False (b) True

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