Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 260 · 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? What do we do with “the weight of the bob”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a sharp tool (d) a glass bottle
3. 3.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) it is wet (d) the bob could hit you
4. 4.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
5. 5.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) gravity (d) magnetism
6. 6.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) yeast (c) a string (d) a heavy nut or washer
7. 7.⚖️ 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
8. 8.🕰️ 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
9. 9.⚖️ 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
10. 10.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
11. 11.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a ruler (d) a balloon
12. 12.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a stopwatch (c) a mirror (d) a ruler
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
14. 14.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
15. 15.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
17. 17.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a sundial (d) a phone
18. 18.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a lighter bob (d) a heavier bob
19. 19.⚖️ 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) time for 10 swings (c) the same hook (d) the weight of the bob
20. 20.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
21. 21.🧺 Which of these is needed for the pendulum? (a) a mirror (b) turmeric powder (c) yeast (d) a string
22. 22.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
23. 23.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a battery cell (c) a heavy nut or washer (d) a magnet
24. 24.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a balloon (d) a heavy nut or washer
26. 26.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
27. 27.⚖️ 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
28. 28.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) about the same (c) much slower (d) much faster
29. 29.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) yeast (d) a stopwatch
31. 31.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?
32. 32.⚖️ 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
33. 33.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
34. 34.⚖️ 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
35. 35.⚖️ 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
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a pencil and tape (d) a magnet
37. 37.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
38. 38.True or false: a magnet is needed for the pendulum. (a) True (b) False
39. 39.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) yeast (c) a mirror (d) a battery cell
40. 40.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True

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