Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 149 · 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.⚖️ 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
2. 2.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it becomes 4 times (c) it halves (d) it stays the same
3. 3.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a sundial (d) a phone
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a magnet (d) a ruler
5. 5.⚖️ 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
6. 6.True or false: yeast is not needed for the pendulum. (a) False (b) True
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a battery cell (c) a ruler (d) a string
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the weight of the bob (c) time for 10 swings (d) the string length
9. 9.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) turmeric powder (d) a string
10. 10.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) it cannot swing (c) much faster (d) about the same
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) the same hook (c) time for 10 swings
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we change it (c) we keep it the same
13. 13.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a mirror (d) a string
14. 14.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) it stops swinging (d) yes, much faster
15. 15.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
16. 16.⚖️ 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 keep it the same (c) we measure it
17. 17.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is wet (d) it is magnetic
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the weight of the bob (c) time for 10 swings (d) how far we pull it back
19. 19.⚖️ 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
20. 20.⚖️ 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) how far we pull it back
21. 21.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a ruler (c) a heavy nut or washer (d) a stopwatch
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
25. 25.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
26. 26.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a heavy brick (d) a sharp tool
27. 27.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
28. 28.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a lighter bob (d) a shorter string
29. 29.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
30. 30.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 14 seconds?
31. 31.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
32. 32.True or false: a ruler is not needed for the pendulum. (a) True (b) False
33. 33.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
34. 34.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
35. 35.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
36. 36.True or false: a string is not needed for the pendulum. (a) True (b) False
37. 37.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
38. 38.⚖️ 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) True (b) False
39. 39.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a magnet (c) a heavy nut or washer (d) a mirror
40. 40.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed

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