Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 392 · 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.🧺 Which of these is not needed for the pendulum? (a) a string (b) yeast (c) a heavy nut or washer (d) a ruler
2. 2.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
3. 3.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
4. 4.True or false: a string is needed for the pendulum. (a) False (b) True
5. 5.⚖️ 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 measure it (c) we change it
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we keep it the same (c) we measure it
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a heavy nut or washer (c) a ruler (d) a stopwatch
8. 8.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
9. 9.🔮 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
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) time for 10 swings (c) the string length
11. 11.⚖️ 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) True (b) False
12. 12.⚖️ 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
13. 13.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
14. 14.True or false: a ruler is needed for the pendulum. (a) True (b) False
15. 15.⚖️ 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) the weight of the bob (c) the same hook (d) how far we pull it back
16. 16.🔮 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
17. 17.⚖️ 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
18. 18.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
19. 19.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
20. 20.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
21. 21.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a ruler (c) a pencil and tape (d) a stopwatch
22. 22.⚖️ 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
23. 23.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a heavier bob (d) a lighter bob
24. 24.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
25. 25.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
26. 26.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
27. 27.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
28. 28.True or false: yeast is needed for the pendulum. (a) False (b) True
29. 29.🕰️ 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) 10 is a lucky number (d) it is more fun
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) time for 10 swings (c) the string length (d) how far we pull it back
31. 31.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
32. 32.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a stopwatch (c) a pencil and tape (d) a ruler
33. 33.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a stopwatch (c) a magnet (d) a battery cell
34. 34.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a mirror (c) a magnet (d) turmeric powder
35. 35.⚖️ 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
36. 36.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) quicker (d) heavier
37. 37.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
38. 38.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) it is hot (d) the bob could hit you
39. 39.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it

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