Simple Pendulum Experiment Worksheet

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

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