Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 927 · 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 “time for 10 swings”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a mirror (c) a pencil and tape (d) a heavy nut or washer
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
4. 4.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
5. 5.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
6. 6.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
7. 7.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 36 seconds?
8. 8.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
9. 9.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a phone (d) a digital watch
10. 10.⚖️ 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
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a pencil and tape (c) a string (d) a stopwatch
12. 12.True or false: a string is not needed for the pendulum. (a) True (b) False
13. 13.⚖️ 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
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we keep it the same (c) we measure it
15. 15.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) stopped (d) quicker
16. 16.True or false: a mirror is not needed for the pendulum. (a) True (b) False
17. 17.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a glass bottle (d) a small nut or washer
18. 18.🔮 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
19. 19.🧺 Which of these is needed for the pendulum? (a) a ruler (b) yeast (c) a balloon (d) a battery cell
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the weight of the bob (c) the same hook (d) the string length
21. 21.⚖️ 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) True (b) False
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
23. 23.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a mirror (d) a string
24. 24.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a string (d) a mirror
25. 25.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) it cannot swing (c) much slower (d) much faster
26. 26.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is hot (d) it is wet
27. 27.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a shorter string (d) a heavier bob
28. 28.⚖️ 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
29. 29.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
30. 30.⚖️ 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
31. 31.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) it is more accurate (d) one swing is too slow
32. 32.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 18 seconds?
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a stopwatch (d) a battery cell
34. 34.True or false: a mirror is needed for the pendulum. (a) True (b) False
35. 35.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a balloon (d) a ruler
36. 36.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
37. 37.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a string (d) turmeric powder
38. 38.⚖️ 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) how far we pull it back
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a ruler (c) a string (d) a stopwatch
40. 40.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?

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