Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 924 · 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 “how far we pull it back”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it doubles (d) it becomes 4 times
3. 3.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
4. 4.⚖️ 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
5. 5.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a heavy brick (d) a small nut or washer
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) the same hook (c) the string length (d) time for 10 swings
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a heavy nut or washer (d) turmeric powder
8. 8.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
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.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 33 seconds?
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we keep it the same (c) we measure it
12. 12.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
13. 13.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
15. 15.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a magnet (d) a heavy nut or washer
17. 17.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 27 seconds?
18. 18.⚖️ 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
19. 19.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
20. 20.⚖️ 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
21. 21.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
22. 22.True or false: a string is needed for the pendulum. (a) True (b) False
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False
24. 24.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) magnetism (d) gravity
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a heavy nut or washer (c) a stopwatch (d) a pencil and tape
26. 26.⚖️ 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) True (b) False
27. 27.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) one swing is too slow (d) it is more accurate
28. 28.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a string (c) turmeric powder (d) a balloon
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the string length (c) time for 10 swings (d) the weight of the bob
30. 30.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) the bob could hit you (d) it is wet
31. 31.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
32. 32.⚖️ 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
33. 33.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
34. 34.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
35. 35.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
36. 36.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a string (d) turmeric powder
37. 37.⚖️ 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 measure it (c) we keep it the same
38. 38.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a magnet (d) a ruler
39. 39.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) yeast (c) a pencil and tape (d) a mirror
40. 40.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a ruler (c) a balloon (d) turmeric powder

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