Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 960 · 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.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
2. 2.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) stopped (d) quicker
3. 3.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
4. 4.⚖️ 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) time for 10 swings (c) the same hook (d) the weight of the bob
5. 5.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a stopwatch (d) turmeric powder
7. 7.True or false: yeast is needed for the pendulum. (a) False (b) True
8. 8.⚖️ 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
9. 9.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a ruler (d) a balloon
10. 10.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a grandfather clock (d) a phone
11. 11.True or false: a balloon is not needed for the pendulum. (a) False (b) True
12. 12.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
13. 13.⚖️ 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
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) True (b) False
15. 15.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
16. 16.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
17. 17.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 18 seconds?
18. 18.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) the bob could hit you (d) it is wet
19. 19.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 42 seconds?
20. 20.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) turmeric powder (c) a pencil and tape (d) a stopwatch
21. 21.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a pencil and tape (d) turmeric powder
22. 22.🔮 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
23. 23.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a pencil and tape (c) a string (d) a ruler
26. 26.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
27. 27.⚖️ 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
28. 28.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a sharp tool (d) a small nut or washer
29. 29.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a heavy nut or washer (d) a mirror
30. 30.True or false: yeast is not needed for the pendulum. (a) False (b) True
31. 31.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a lighter bob (d) a heavier bob
32. 32.⚖️ 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
33. 33.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
35. 35.True or false: a mirror is needed for the pendulum. (a) True (b) False
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) False (b) True
37. 37.⚖️ 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) the same hook (c) the string length
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a mirror (d) a heavy nut or washer
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a magnet (d) a pencil and tape
40. 40.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it stays the same (d) it doubles

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