Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 633 · 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.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
2. 2.⚖️ 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) the same hook (c) time for 10 swings (d) the string length
3. 3.⚖️ 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 measure it (c) we change it
4. 4.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
5. 5.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
6. 6.True or false: a string is needed for the pendulum. (a) False (b) True
7. 7.⚖️ 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
8. 8.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we keep it the same (c) we measure it
10. 10.⚖️ 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) how far we pull it back (c) the weight of the bob (d) the string length
11. 11.🔮 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
12. 12.🔮 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
13. 13.True or false: a string is not needed for the pendulum. (a) True (b) False
14. 14.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
15. 15.🛟 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
16. 16.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
17. 17.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a sundial (d) a grandfather clock
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) turmeric powder (d) a heavy nut or washer
19. 19.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a small nut or washer (d) a heavy brick
20. 20.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
21. 21.🧺 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 pencil and tape
22. 22.True or false: a magnet is needed for the pendulum. (a) True (b) False
23. 23.⚖️ 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 change it (c) we measure it
24. 24.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
25. 25.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
26. 26.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a string (d) a balloon
27. 27.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) turmeric powder (c) a stopwatch (d) a magnet
28. 28.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) no, hardly at all (d) it stops swinging
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) how far we pull it back (c) the string length
30. 30.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a lighter bob (d) a shorter string
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a heavy nut or washer (d) a mirror
32. 32.True or false: yeast is not needed for the pendulum. (a) False (b) True
33. 33.⚖️ 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
34. 34.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a string (d) turmeric powder
35. 35.True or false: a balloon is needed for the pendulum. (a) False (b) True
36. 36.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a mirror (c) a ruler (d) yeast
37. 37.⚖️ 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
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) time for 10 swings (c) the string length
39. 39.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a ruler (c) a string (d) a pencil and tape

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