Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 740 · 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? Which of these is what we measure? (a) the weight of the bob (b) how far we pull it back (c) the string length (d) time for 10 swings
2. 2.🛟 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
3. 3.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) the bob could hit you (d) it is hot
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we measure it (c) we change it
5. 5.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
6. 6.⚖️ 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) the same hook
7. 7.⚖️ 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 change it (c) we keep it the same
8. 8.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
9. 9.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a heavy nut or washer (d) a magnet
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a ruler (c) a stopwatch (d) a string
12. 12.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
13. 13.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
14. 14.⚖️ 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 string length (c) the same hook (d) time for 10 swings
15. 15.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
16. 16.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 32 seconds?
17. 17.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a shorter string (d) a longer string
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a pencil and tape (d) a battery cell
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a string (c) a stopwatch (d) a pencil and tape
20. 20.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
21. 21.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) yeast (d) a pencil and tape
22. 22.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
23. 23.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
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 keep it the same (c) we change it
25. 25.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a grandfather clock (d) a phone
26. 26.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) yeast (d) a string
27. 27.🧺 Which of these is not needed for the pendulum? (a) a string (b) a mirror (c) a pencil and tape (d) a heavy nut or washer
28. 28.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?
29. 29.⚖️ 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
30. 30.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) it cannot swing (d) much faster
31. 31.⚖️ 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) False (b) True
32. 32.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a heavy nut or washer (d) a battery cell
33. 33.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
34. 34.🧺 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
35. 35.True or false: a mirror is not needed for the pendulum. (a) False (b) True
36. 36.⚖️ 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
37. 37.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is kept the same. (a) True (b) False
39. 39.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 18 seconds?
40. 40.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed

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