Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 96 · 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) 10 is a lucky number (b) it is more accurate (c) one swing is too slow (d) it is more fun
2. 2.⚖️ 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
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a ruler (c) a stopwatch (d) a heavy nut or washer
4. 4.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 22 seconds?
5. 5.⚖️ 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
6. 6.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
7. 7.⚖️ 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 string length (c) the weight of the bob (d) the same hook
8. 8.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) heavier (d) stopped
9. 9.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a heavy brick (d) a sharp tool
10. 10.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
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.🧺 Which of these is needed for the pendulum? (a) a string (b) turmeric powder (c) a balloon (d) a mirror
13. 13.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
15. 15.True or false: a balloon is not needed for the pendulum. (a) True (b) False
16. 16.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
17. 17.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is magnetic (d) it is hot
18. 18.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a ruler (c) a magnet (d) a battery cell
19. 19.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a mirror (c) yeast (d) a battery cell
20. 20.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) it cannot swing (d) much slower
21. 21.⚖️ 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) False (b) True
22. 22.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 24 seconds?
23. 23.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
24. 24.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
25. 25.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it stays the same (c) it halves (d) it becomes 4 times
26. 26.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
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 same hook (c) the string length
28. 28.⚖️ 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 change it (c) we keep it the same
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a stopwatch (d) a battery cell
30. 30.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
31. 31.⚖️ 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
32. 32.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a shorter string (d) a lighter bob
33. 33.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
34. 34.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
35. 35.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) a string (d) yeast
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) turmeric powder (c) a pencil and tape (d) a ruler
37. 37.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a magnet (c) a heavy nut or washer (d) a string
38. 38.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a heavy nut or washer (c) a ruler (d) a stopwatch
40. 40.⚖️ 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

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