Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 233 · 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 measure it (b) we keep it the same (c) we change it
2. 2.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
3. 3.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 12 seconds?
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) the string length (c) time for 10 swings
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 change it (c) we measure it
6. 6.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a magnet (d) a stopwatch
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) yeast (c) a pencil and tape (d) a heavy nut or washer
9. 9.⚖️ 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) how far we pull it back (c) time for 10 swings (d) the weight of the bob
10. 10.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
11. 11.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
12. 12.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
13. 13.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) heavier (d) stopped
14. 14.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
15. 15.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a shorter string (d) a heavier bob
16. 16.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) it cannot swing (c) much faster (d) about the same
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we measure it (c) we change it
18. 18.⚖️ 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
19. 19.True or false: a balloon is needed for the pendulum. (a) True (b) False
20. 20.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a heavy nut or washer (c) yeast (d) turmeric powder
21. 21.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
22. 22.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
23. 23.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a magnet (c) a pencil and tape (d) a mirror
24. 24.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it halves (c) it stays the same (d) it doubles
25. 25.🕰️ 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) it is more accurate (d) one swing is too slow
26. 26.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a ruler (c) a stopwatch (d) yeast
27. 27.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
28. 28.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
29. 29.⚖️ 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
30. 30.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
31. 31.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a mirror (c) a pencil and tape (d) a stopwatch
33. 33.🛟 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
34. 34.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
35. 35.⚖️ 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
36. 36.True or false: yeast is needed for the pendulum. (a) True (b) False
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
38. 38.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
39. 39.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) no, hardly at all (d) yes, much faster
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is kept the same. (a) False (b) True

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