Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 617 · 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 15 swings in 15 seconds. How many seconds does one swing take?
2. 2.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
3. 3.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a pencil and tape (d) a mirror
4. 4.🛟 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
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 change it (b) we keep it the same (c) we measure it
6. 6.⚖️ 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
7. 7.⚖️ 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 measure it (c) we change it
8. 8.⚖️ 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
9. 9.⚖️ 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
10. 10.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a sundial (d) a digital watch
11. 11.⚖️ 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
12. 12.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a heavier bob (d) a shorter string
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a ruler (c) a string (d) a heavy nut or washer
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we change it (c) we keep it the same
15. 15.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) heavier (d) slower
16. 16.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a balloon (c) a mirror (d) a magnet
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) turmeric powder (c) a string (d) a pencil and tape
18. 18.True or false: a mirror is needed for the pendulum. (a) False (b) True
19. 19.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a small nut or washer (d) a glass bottle
20. 20.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
21. 21.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
22. 22.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a ruler (d) yeast
23. 23.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) 10 is a lucky number (c) it is more fun (d) it is more accurate
24. 24.⚖️ 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
25. 25.⚖️ 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) the same hook (c) the string length (d) time for 10 swings
26. 26.True or false: a string is needed for the pendulum. (a) False (b) True
27. 27.🔮 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
28. 28.True or false: a string is not needed for the pendulum. (a) False (b) True
29. 29.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
30. 30.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
31. 31.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
32. 32.True or false: a magnet is needed for the pendulum. (a) True (b) False
33. 33.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a pencil and tape (c) a ruler (d) a stopwatch
34. 34.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a mirror (c) a string (d) yeast
35. 35.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
36. 36.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
37. 37.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
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) True (b) False
39. 39.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a balloon (d) a ruler
40. 40.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed

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