Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 655 · 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 do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) 10 is a lucky number (c) it is more accurate (d) it is more fun
2. 2.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a lighter bob (c) a shorter string (d) a heavier bob
3. 3.⚖️ 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) how far we pull it back (c) the string length (d) time for 10 swings
4. 4.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
5. 5.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
6. 6.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a heavy brick (d) a small nut or washer
7. 7.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
8. 8.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a phone (d) a sundial
9. 9.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
10. 10.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a battery cell (c) a balloon (d) yeast
11. 11.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
12. 12.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 32 seconds?
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.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.⚖️ 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
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a balloon (d) a string
18. 18.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
19. 19.True or false: a magnet is needed for the pendulum. (a) False (b) True
20. 20.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
22. 22.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
23. 23.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it doubles (d) it becomes 4 times
24. 24.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 11 seconds?
25. 25.🛟 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
26. 26.True or false: a string is not needed for the pendulum. (a) False (b) True
27. 27.True or false: a balloon is not needed for the pendulum. (a) False (b) True
28. 28.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a stopwatch (c) a ruler (d) a balloon
29. 29.⚖️ 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 measure it (c) we keep it the same
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
31. 31.True or false: a balloon is needed for the pendulum. (a) False (b) True
32. 32.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) no, hardly at all (d) yes, much faster
33. 33.True or false: a magnet is not 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 “time for 10 swings”? (a) we measure it (b) we keep it the same (c) we change it
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a battery cell (d) a string
36. 36.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a magnet (c) a heavy nut or washer (d) a string
37. 37.⚖️ 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
38. 38.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a string (c) a magnet (d) turmeric powder
39. 39.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
40. 40.⚖️ 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 measure it (c) we change it

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