Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 624 · 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.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it stays the same (c) it becomes 4 times (d) it halves
2. 2.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
3. 3.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the weight of the bob (c) time for 10 swings
5. 5.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
6. 6.⚖️ 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
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a mirror (c) a ruler (d) a pencil and tape
8. 8.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a sharp tool (d) a heavy brick
9. 9.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) it is more accurate (d) 10 is a lucky number
10. 10.⚖️ 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 same hook (c) the weight of the bob (d) how far we pull it back
11. 11.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) gravity (d) the string
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) False (b) True
13. 13.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
14. 14.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a longer string (d) a heavier bob
15. 15.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) a heavy nut or washer (d) a balloon
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a pencil and tape (d) a balloon
17. 17.⚖️ 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
18. 18.True or false: a mirror is not needed for the pendulum. (a) False (b) True
19. 19.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
20. 20.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a battery cell (c) a string (d) a magnet
21. 21.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) a ruler (d) yeast
22. 22.⚖️ 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
23. 23.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a sundial (d) a grandfather clock
24. 24.🔮 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 faster (d) much slower
25. 25.⚖️ 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 keep it the same (c) we measure it
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) yeast (c) a ruler (d) a stopwatch
27. 27.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a magnet (c) a pencil and tape (d) turmeric powder
28. 28.⚖️ 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 keep it the same (c) we change it
29. 29.⚖️ 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) False (b) True
30. 30.True or false: a string is needed for the pendulum. (a) False (b) True
31. 31.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
32. 32.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
33. 33.True or false: a balloon is needed for the pendulum. (a) True (b) False
34. 34.⚖️ 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
35. 35.⚖️ 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
36. 36.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
37. 37.🧺 Which of these is needed for the pendulum? (a) yeast (b) turmeric powder (c) a heavy nut or washer (d) a mirror
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a heavy nut or washer (d) a magnet
39. 39.⚖️ 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
40. 40.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) a stopwatch (d) a mirror

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