Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 15 · 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 of these is not needed for the pendulum? (a) a ruler (b) a mirror (c) a pencil and tape (d) a stopwatch
2. 2.⚖️ 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
3. 3.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a magnet (d) a ruler
5. 5.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a stopwatch (d) turmeric powder
6. 6.⚖️ 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
7. 7.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
8. 8.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
9. 9.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
10. 10.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a heavy nut or washer (c) a pencil and tape (d) a string
11. 11.🧺 Which of these is needed for the pendulum? (a) yeast (b) a mirror (c) a balloon (d) a string
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) False (b) True
13. 13.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) quicker (d) heavier
14. 14.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
15. 15.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
16. 16.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 60 seconds?
17. 17.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) one swing is too slow (c) it is more fun (d) it is more accurate
18. 18.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a sharp tool (d) a heavy brick
19. 19.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the wind (d) the string
20. 20.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a digital watch (d) a sundial
21. 21.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
22. 22.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
23. 23.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is wet (d) it is hot
24. 24.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
25. 25.True or false: yeast is not needed for the pendulum. (a) False (b) True
26. 26.⚖️ 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 change it (c) we measure it
27. 27.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a battery cell (c) a pencil and tape (d) a mirror
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) turmeric powder (d) a stopwatch
29. 29.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 11 seconds?
30. 30.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it becomes 4 times (c) it stays the same (d) it halves
31. 31.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a longer string (d) a shorter string
32. 32.⚖️ 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 measure it (c) we keep it the same
33. 33.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a pencil and tape (d) a balloon
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) time for 10 swings (c) the string length
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a battery cell (c) a stopwatch (d) a heavy nut or washer
36. 36.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
37. 37.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) the same hook (c) the string length (d) time for 10 swings
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
40. 40.🔮 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

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