Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 253 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a balloon (d) a string
2. 2.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we keep it the same (c) we measure it
4. 4.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a pencil and tape (c) a string (d) a heavy nut or washer
6. 6.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much faster (d) yes, much slower
7. 7.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 14 seconds?
8. 8.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a string (c) a magnet (d) a balloon
9. 9.⚖️ 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
10. 10.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a battery cell (c) a stopwatch (d) a magnet
11. 11.⚖️ 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) False (b) True
12. 12.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
14. 14.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) stopped (c) heavier (d) slower
15. 15.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a sharp tool (d) a glass bottle
16. 16.True or false: a mirror is not needed for the pendulum. (a) True (b) False
17. 17.True or false: a mirror is needed for the pendulum. (a) True (b) False
18. 18.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
19. 19.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) about the same (d) it cannot swing
20. 20.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a grandfather clock (d) a digital watch
21. 21.⚖️ 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) True (b) False
22. 22.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
23. 23.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
24. 24.⚖️ 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) time for 10 swings (c) the same hook (d) how far we pull it back
25. 25.⚖️ 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
26. 26.⚖️ 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
27. 27.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a magnet (d) a stopwatch
28. 28.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a pencil and tape (d) yeast
29. 29.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
30. 30.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) yeast (c) a string (d) a stopwatch
31. 31.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a stopwatch (d) a balloon
32. 32.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
33. 33.⚖️ 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
34. 34.🛟 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
35. 35.True or false: a magnet is not needed for the pendulum. (a) False (b) True
36. 36.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a heavy nut or washer (d) turmeric powder
37. 37.⚖️ 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
38. 38.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it doubles (d) it stays the same
39. 39.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
40. 40.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?

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