Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 444 · 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.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a digital watch (d) a grandfather clock
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we change it (c) we keep it the same
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) turmeric powder (d) a heavy nut or washer
4. 4.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
5. 5.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
6. 6.True or false: a balloon is needed for the pendulum. (a) False (b) True
7. 7.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
8. 8.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it halves (d) it doubles
9. 9.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
10. 10.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a lighter bob (d) a shorter string
11. 11.⚖️ 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 change it (b) we measure it (c) we keep it the same
12. 12.🔮 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
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) time for 10 swings (c) how far we pull it back (d) the same hook
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a stopwatch (d) a balloon
15. 15.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a ruler (c) a heavy nut or washer (d) a pencil and tape
16. 16.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a sharp tool (d) a small nut or washer
17. 17.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
18. 18.⚖️ 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 keep it the same (c) we change it
19. 19.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
20. 20.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) slower (d) quicker
21. 21.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a balloon (c) a magnet (d) turmeric powder
22. 22.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) the bob could hit you (d) it is hot
23. 23.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a stopwatch (c) a heavy nut or washer (d) a string
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) yeast (c) a pencil and tape (d) a ruler
25. 25.⚖️ 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
26. 26.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a stopwatch (c) a string (d) a heavy nut or washer
27. 27.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
28. 28.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 24 seconds?
29. 29.⚖️ 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
30. 30.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
31. 31.True or false: yeast is needed for the pendulum. (a) True (b) False
32. 32.🕰️ 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
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
34. 34.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
35. 35.⚖️ 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
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a stopwatch (c) a heavy nut or washer (d) a pencil and tape
37. 37.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a balloon (d) a string
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) False (b) True
39. 39.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
40. 40.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?

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