Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 780 · 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? True or false: the weight of the bob is what we measure. (a) True (b) False
2. 2.⚖️ 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
3. 3.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a shorter string (d) a longer string
4. 4.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
5. 5.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 36 seconds?
6. 6.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) about the same (d) much slower
7. 7.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 18 seconds?
8. 8.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a battery cell (c) a balloon (d) a mirror
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) time for 10 swings (c) the same hook (d) the weight of the bob
10. 10.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
11. 11.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a mirror (c) a pencil and tape (d) a ruler
13. 13.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
14. 14.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
15. 15.⚖️ 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) True (b) False
16. 16.⚖️ 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 weight of the bob (c) the string length
17. 17.🧺 Which of these is needed for the pendulum? (a) a ruler (b) turmeric powder (c) a magnet (d) yeast
18. 18.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) stopped (d) heavier
19. 19.True or false: a ruler is needed for the pendulum. (a) True (b) False
20. 20.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a small nut or washer (d) a glass bottle
21. 21.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) it is magnetic (d) the bob could hit you
22. 22.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
23. 23.⚖️ 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
24. 24.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
25. 25.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a magnet (c) a string (d) a heavy nut or washer
26. 26.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
27. 27.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
28. 28.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
29. 29.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a heavy nut or washer (d) turmeric powder
30. 30.⚖️ 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 keep it the same (c) we measure it
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
32. 32.True or false: a balloon is not needed for the pendulum. (a) False (b) True
33. 33.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it stays the same (c) it halves (d) it becomes 4 times
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we keep it the same (c) we change it
35. 35.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
36. 36.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
37. 37.🕰️ 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) it is more accurate (d) one swing is too slow
38. 38.True or false: a string is not needed for the pendulum. (a) True (b) False
39. 39.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
40. 40.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a digital watch (d) a grandfather clock

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