Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 216 · 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.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a heavy brick (d) a glass bottle
2. 2.⚖️ 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
3. 3.True or false: a magnet is needed for the pendulum. (a) True (b) False
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a string (c) a ruler (d) a pencil and tape
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 keep it the same (b) we change it (c) we measure it
6. 6.🛟 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
7. 7.⚖️ 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) False (b) True
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 keep it the same (b) we change it (c) we measure it
9. 9.True or false: a ruler is not needed for the pendulum. (a) False (b) True
10. 10.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) a balloon (d) turmeric powder
11. 11.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
12. 12.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a ruler (d) a battery cell
13. 13.⚖️ 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
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) time for 10 swings (c) the string length
15. 15.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a longer string (d) a shorter string
16. 16.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a ruler (c) a string (d) yeast
17. 17.⚖️ 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) how far we pull it back (c) the string length (d) the same hook
18. 18.⚖️ 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
19. 19.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) it cannot swing (d) much slower
20. 20.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
21. 21.⚖️ 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
22. 22.🧺 Which of these is not needed for the pendulum? (a) a string (b) a magnet (c) a stopwatch (d) a heavy nut or washer
23. 23.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a magnet (c) a battery cell (d) a balloon
24. 24.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) slower (d) stopped
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) yeast (d) a pencil and tape
26. 26.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
27. 27.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the wind (d) the string
28. 28.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
29. 29.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
30. 30.⚖️ 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
31. 31.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a sundial (d) a digital watch
32. 32.True or false: a mirror is not needed for the pendulum. (a) False (b) True
33. 33.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
34. 34.⚖️ 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
35. 35.⚖️ 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
36. 36.⚖️ 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
37. 37.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a battery cell (d) a pencil and tape
38. 38.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a stopwatch (c) yeast (d) a magnet
39. 39.🔮 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
40. 40.True or false: a string is not needed for the pendulum. (a) False (b) True

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