Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 240 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a balloon (c) a ruler (d) a pencil and tape
2. 2.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
3. 3.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
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) 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 measure it (b) we change it (c) we keep it the same
6. 6.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
7. 7.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
8. 8.⚖️ 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
9. 9.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) it stops swinging (c) yes, much slower (d) yes, much faster
10. 10.⚖️ 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 same hook (c) the weight of the bob (d) the string length
11. 11.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a string (c) a heavy nut or washer (d) a stopwatch
12. 12.🔮 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 becomes 4 times (d) it doubles
13. 13.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
14. 14.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) 10 is a lucky number (d) it is more accurate
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 same hook (b) the string length (c) how far we pull it back (d) the weight of the bob
16. 16.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a small nut or washer (d) a sharp tool
17. 17.⚖️ 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
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
19. 19.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the string (d) the wind
20. 20.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) it cannot swing (d) about the same
21. 21.🛟 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
22. 22.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
23. 23.⚖️ 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 change it (c) we keep it the same
24. 24.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we measure it (c) we keep it the same
26. 26.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
27. 27.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) slower (d) quicker
28. 28.True or false: a ruler is needed for the pendulum. (a) False (b) True
29. 29.True or false: a magnet is needed for the pendulum. (a) True (b) False
30. 30.⚖️ 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
31. 31.🧺 Which of these is not needed for the pendulum? (a) a string (b) turmeric powder (c) a heavy nut or washer (d) a pencil and tape
32. 32.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a stopwatch (c) turmeric powder (d) a mirror
33. 33.⚖️ 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
34. 34.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
35. 35.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
36. 36.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
37. 37.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
38. 38.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
39. 39.⚖️ 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
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a pencil and tape (c) a string (d) a heavy nut or washer

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