Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 700 · 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 a balloon for the pendulum? (a) needed (b) not needed
2. 2.⚖️ 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
3. 3.⚖️ 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
4. 4.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
5. 5.🔮 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 becomes 4 times (d) it halves
6. 6.⚖️ 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
7. 7.⚖️ 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
8. 8.⚖️ 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
9. 9.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) stopped (d) quicker
10. 10.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the string (c) magnetism (d) the wind
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 measure it (b) we change it (c) we keep it the same
12. 12.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) yes, much slower (d) it stops swinging
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) False (b) True
14. 14.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
15. 15.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
16. 16.True or false: a ruler is not needed for the pendulum. (a) True (b) False
17. 17.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
18. 18.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) turmeric powder (d) a ruler
19. 19.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a balloon (d) a heavy nut or washer
21. 21.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a string (c) turmeric powder (d) yeast
22. 22.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a magnet (d) a heavy nut or washer
23. 23.⚖️ 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) True (b) False
24. 24.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
25. 25.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is hot (d) it is magnetic
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a magnet (d) a pencil and tape
27. 27.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a heavy brick (c) a glass bottle (d) a sharp tool
28. 28.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
29. 29.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
30. 30.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a magnet (c) yeast (d) a balloon
31. 31.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a magnet (d) a stopwatch
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the string length (c) how far we pull it back (d) the weight of the bob
33. 33.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 57 seconds?
34. 34.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a phone (d) a grandfather clock
35. 35.⚖️ 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
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) yeast (d) a string
37. 37.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
38. 38.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
39. 39.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) turmeric powder (d) a stopwatch

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