Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 560 · 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.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a longer string (d) a lighter bob
2. 2.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
3. 3.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it halves (d) it stays the same
4. 4.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is hot (d) it is magnetic
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we change it (c) we keep it the same
6. 6.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a magnet (c) yeast (d) turmeric powder
7. 7.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
8. 8.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a ruler (c) a stopwatch (d) a heavy nut or washer
10. 10.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a grandfather clock (d) a sundial
11. 11.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
12. 12.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a battery cell (c) a heavy nut or washer (d) a pencil and tape
13. 13.🕰️ 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) one swing is too slow (d) it is more accurate
14. 14.⚖️ 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 keep it the same (c) we change it
15. 15.⚖️ 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
16. 16.True or false: a magnet is not needed for the pendulum. (a) True (b) False
17. 17.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a balloon (c) a string (d) a mirror
18. 18.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
19. 19.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
20. 20.⚖️ 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) the weight of the bob (c) the same hook (d) how far we pull it back
21. 21.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a glass bottle (d) a sharp tool
22. 22.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a pencil and tape (d) a magnet
23. 23.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) yeast (c) a mirror (d) a magnet
24. 24.⚖️ 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
25. 25.True or false: a mirror is not needed for the pendulum. (a) True (b) False
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) the same hook (c) how far we pull it back (d) time for 10 swings
27. 27.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
28. 28.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
29. 29.True or false: a string is needed for the pendulum. (a) True (b) False
30. 30.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a balloon (c) a ruler (d) a pencil and tape
32. 32.⚖️ 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) False (b) True
33. 33.True or false: a battery cell is needed for the pendulum. (a) False (b) True
34. 34.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) no, hardly at all (d) it stops swinging
35. 35.⚖️ 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
36. 36.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
37. 37.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
38. 38.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) stopped (c) slower (d) heavier
39. 39.⚖️ 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
40. 40.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much faster (c) it cannot swing (d) much slower

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