Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 493 · 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.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
2. 2.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
3. 3.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
4. 4.⚖️ 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) time for 10 swings (d) how far we pull it back
5. 5.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 57 seconds?
6. 6.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) it cannot swing (d) much faster
7. 7.True or false: a string is needed for the pendulum. (a) False (b) True
8. 8.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
9. 9.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) one swing is too slow (d) it is more accurate
10. 10.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) the bob could hit you (d) it is wet
11. 11.True or false: a magnet is not needed for the pendulum. (a) False (b) True
12. 12.⚖️ 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
13. 13.⚖️ 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 string length (c) the same hook (d) the weight of the bob
14. 14.⚖️ 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
15. 15.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) it stops swinging (d) no, hardly at all
16. 16.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
17. 17.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a sundial (d) a digital watch
18. 18.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) a battery cell (d) a string
19. 19.⚖️ 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
20. 20.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
21. 21.True or false: a string is not needed for the pendulum. (a) True (b) False
22. 22.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a heavy nut or washer (d) turmeric powder
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a pencil and tape (d) a magnet
24. 24.⚖️ 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
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a battery cell (d) a pencil and tape
26. 26.True or false: yeast is needed for the pendulum. (a) True (b) False
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a mirror (d) a pencil and tape
28. 28.⚖️ 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 same hook
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) how far we pull it back (c) time for 10 swings
30. 30.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
31. 31.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) a stopwatch (d) yeast
33. 33.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it stays the same (d) it becomes 4 times
34. 34.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a stopwatch (d) a balloon
35. 35.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a lighter bob (c) a heavier bob (d) a shorter string
36. 36.⚖️ 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) True (b) False
37. 37.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
38. 38.⚖️ 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 measure it (b) we keep it the same (c) we change it
39. 39.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a heavy brick (d) a small nut or washer
40. 40.True or false: a ruler is needed for the pendulum. (a) True (b) False

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