Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 601 · 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 measure it (b) we change it (c) we keep it the same
2. 2.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) it is more accurate (d) 10 is a lucky number
3. 3.⚖️ 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 weight of the bob
4. 4.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
5. 5.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the same hook (c) the weight of the bob (d) time for 10 swings
7. 7.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
8. 8.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is magnetic (c) it is wet (d) it is hot
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) time for 10 swings (c) the string length
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a balloon (d) a pencil and tape
11. 11.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
12. 12.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
13. 13.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
14. 14.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) turmeric powder (d) a stopwatch
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a ruler (d) yeast
16. 16.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it stays the same (d) it doubles
17. 17.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
18. 18.⚖️ 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
19. 19.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) a magnet (d) a ruler
20. 20.⚖️ 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
21. 21.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we keep it the same (c) we measure it
23. 23.⚖️ 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
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we measure it (c) we change it
25. 25.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a magnet (c) a stopwatch (d) a battery cell
26. 26.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the wind (c) magnetism (d) the string
27. 27.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
28. 28.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the string length (c) how far we pull it back
30. 30.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) it cannot swing (d) about the same
31. 31.True or false: a balloon is not needed for the pendulum. (a) False (b) True
32. 32.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 51 seconds?
33. 33.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a heavy brick (d) a sharp tool
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the string length (c) the same hook (d) the weight of the bob
35. 35.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) turmeric powder (c) a string (d) a balloon
36. 36.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a mirror (d) a pencil and tape
37. 37.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) yes, much slower (d) no, hardly at all
38. 38.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a grandfather clock (d) a digital watch
39. 39.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
40. 40.🧺 Which of these is needed for the pendulum? (a) a mirror (b) turmeric powder (c) a pencil and tape (d) a battery cell

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