Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 602 · 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.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 57 seconds?
2. 2.⚖️ 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
3. 3.🕰️ 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
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a string (c) a stopwatch (d) a ruler
5. 5.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a sundial (d) a phone
6. 6.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
7. 7.⚖️ 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) the string length (c) time for 10 swings (d) the same hook
8. 8.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
9. 9.⚖️ 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) the same hook
10. 10.⚖️ 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
11. 11.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
12. 12.⚖️ 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
13. 13.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
14. 14.⚖️ 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
15. 15.⚖️ 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
16. 16.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a string (c) a pencil and tape (d) a heavy nut or washer
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) the string length (c) time for 10 swings
19. 19.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
20. 20.True or false: a mirror is not needed for the pendulum. (a) False (b) True
21. 21.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
22. 22.⚖️ 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
23. 23.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
24. 24.True or false: a ruler is needed for the pendulum. (a) False (b) True
25. 25.🧺 Which of these is needed for the pendulum? (a) yeast (b) a ruler (c) turmeric powder (d) a magnet
26. 26.⚖️ 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
27. 27.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
28. 28.True or false: a mirror is needed for the pendulum. (a) False (b) True
29. 29.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
30. 30.🔮 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 doubles (d) it stays the same
31. 31.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a stopwatch (c) a string (d) a ruler
32. 32.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
33. 33.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
34. 34.⚖️ 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
35. 35.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a pencil and tape (c) a battery cell (d) a mirror
36. 36.⚖️ 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) time for 10 swings (c) the same hook (d) the string length
37. 37.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) about the same (d) much slower
38. 38.True or false: a string is not needed for the pendulum. (a) True (b) False
39. 39.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is magnetic (d) it is wet
40. 40.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) the string (d) gravity

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