Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 981 · 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.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) the bob could hit you (d) it is hot
2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a battery cell (c) a ruler (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 kept the same. (a) True (b) False
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a heavy nut or washer (d) a magnet
5. 5.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
6. 6.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
7. 7.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) much slower (d) about the same
8. 8.True or false: a string is needed for the pendulum. (a) True (b) False
9. 9.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) turmeric powder (c) a string (d) a ruler
10. 10.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a string (c) turmeric powder (d) a balloon
11. 11.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a heavy nut or washer (d) turmeric powder
12. 12.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a lighter bob (d) a longer string
13. 13.🕰️ 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
14. 14.⚖️ 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 measure it (c) we keep it the same
15. 15.True or false: a mirror is not needed for the pendulum. (a) True (b) False
16. 16.⚖️ 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
17. 17.⚖️ 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 string length (d) the weight of the bob
18. 18.🛟 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
19. 19.⚖️ 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 same hook (c) the weight of the bob (d) the string length
20. 20.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much slower (d) yes, much faster
21. 21.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
22. 22.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a mirror (c) a pencil and tape (d) turmeric powder
23. 23.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
24. 24.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it doubles (d) it halves
25. 25.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a battery cell (c) a balloon (d) a ruler
26. 26.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
27. 27.⚖️ 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) False (b) True
28. 28.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a balloon (c) a pencil and tape (d) a string
29. 29.⚖️ 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
30. 30.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 48 seconds?
31. 31.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
32. 32.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
33. 33.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
34. 34.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
35. 35.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
36. 36.⚖️ 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 keep it the same (c) we change it
37. 37.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a grandfather clock (d) a phone
38. 38.⚖️ 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
39. 39.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
40. 40.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True

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