Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 569 · 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.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much faster (c) no, hardly at all (d) yes, much slower
2. 2.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
3. 3.⚖️ 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
4. 4.🔮 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
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
6. 6.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
7. 7.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a heavy brick (d) a glass bottle
8. 8.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
9. 9.⚖️ 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) how far we pull it back (d) the weight of the bob
10. 10.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a mirror (d) a pencil and tape
11. 11.⚖️ 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
12. 12.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
13. 13.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a string (c) a heavy nut or washer (d) a ruler
15. 15.True or false: a magnet is needed for the pendulum. (a) False (b) True
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) turmeric powder (c) a ruler (d) a heavy nut or washer
17. 17.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more accurate (c) one swing is too slow (d) it is more fun
18. 18.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
19. 19.⚖️ 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 keep it the same (b) we change it (c) we measure it
20. 20.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a heavy nut or washer (d) a battery cell
22. 22.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
23. 23.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
24. 24.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) the bob could hit you (d) it is magnetic
25. 25.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a lighter bob (d) a longer string
26. 26.⚖️ 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
27. 27.🔮 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 becomes 4 times (d) it doubles
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a pencil and tape (c) a ruler (d) a heavy nut or washer
29. 29.True or false: a battery cell is needed for the pendulum. (a) False (b) True
30. 30.True or false: yeast is needed for the pendulum. (a) True (b) False
31. 31.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) yeast (d) a pencil and tape
32. 32.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
33. 33.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
34. 34.⚖️ 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) True (b) False
35. 35.True or false: yeast is not needed for the pendulum. (a) True (b) False
36. 36.True or false: a ruler is needed for the pendulum. (a) False (b) True
37. 37.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
38. 38.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a stopwatch (c) a heavy nut or washer (d) a ruler
39. 39.⚖️ 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
40. 40.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) yeast (c) a ruler (d) a string

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