Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 194 · 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.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
2. 2.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
3. 3.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) slower (d) stopped
4. 4.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
5. 5.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
6. 6.⚖️ 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 change it (b) we keep it the same (c) we measure it
7. 7.🛟 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
8. 8.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a balloon (d) a heavy nut or washer
9. 9.True or false: yeast is needed for the pendulum. (a) False (b) True
10. 10.True or false: a battery cell is needed for the pendulum. (a) True (b) False
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a string (d) yeast
12. 12.🧺 Which of these is needed for the pendulum? (a) yeast (b) turmeric powder (c) a string (d) a mirror
13. 13.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) yeast (d) a stopwatch
14. 14.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
15. 15.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) much faster (d) it cannot swing
16. 16.⚖️ 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) False (b) True
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the same hook (c) how far we pull it back (d) time for 10 swings
18. 18.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
19. 19.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a stopwatch (d) a mirror
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the same hook (c) time for 10 swings
21. 21.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is wet (d) it is hot
22. 22.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
23. 23.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
24. 24.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) it is more accurate (d) 10 is a lucky number
25. 25.⚖️ 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) how far we pull it back
26. 26.⚖️ 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
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we keep it the same (c) we measure it
28. 28.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a pencil and tape (d) a balloon
29. 29.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
30. 30.True or false: a balloon is not needed for the pendulum. (a) False (b) True
31. 31.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
32. 32.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
33. 33.⚖️ 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) the weight of the bob (d) the same hook
34. 34.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a string (c) a pencil and tape (d) a heavy nut or washer
36. 36.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) it stops swinging (d) yes, much slower
37. 37.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
38. 38.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
39. 39.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a magnet (d) a pencil and tape
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a magnet (c) a pencil and tape (d) a string

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