Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 18 · 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? Which of these is what we measure? (a) the weight of the bob (b) the string length (c) time for 10 swings (d) how far we pull it back
2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a magnet (c) a heavy nut or washer (d) a string
3. 3.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the wind (c) the string (d) magnetism
4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) stopped (d) heavier
5. 5.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a small nut or washer (d) a sharp tool
6. 6.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we change it (c) we measure it
8. 8.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 51 seconds?
9. 9.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 33 seconds?
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a ruler (c) a string (d) a stopwatch
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) True (b) False
12. 12.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) it is hot (d) the bob could hit you
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) yeast (c) a heavy nut or washer (d) a string
14. 14.🧺 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
15. 15.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a string (d) a mirror
16. 16.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a mirror (d) a pencil and tape
17. 17.True or false: a string is not needed for the pendulum. (a) True (b) False
18. 18.True or false: a mirror is not needed for the pendulum. (a) False (b) True
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) how far we pull it back (c) the string length (d) the weight of the bob
20. 20.⚖️ 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
21. 21.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
22. 22.⚖️ 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
23. 23.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a pencil and tape (c) a ruler (d) a stopwatch
24. 24.⚖️ 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
25. 25.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a phone (d) a grandfather clock
26. 26.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it doubles (d) it halves
27. 27.⚖️ 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) the weight of the bob
28. 28.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
29. 29.⚖️ 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
30. 30.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
31. 31.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much slower (c) much faster (d) it cannot swing
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
33. 33.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much faster (c) no, hardly at all (d) yes, much slower
34. 34.⚖️ 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
35. 35.True or false: a mirror is needed for the pendulum. (a) False (b) True
36. 36.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
37. 37.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a mirror (d) yeast
38. 38.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
39. 39.⚖️ 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
40. 40.⚖️ 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

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