Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 818 · 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.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a small nut or washer (d) a sharp tool
2. 2.⚖️ 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
3. 3.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) magnetism (d) the string
4. 4.⚖️ 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 change it (c) we measure it
5. 5.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) it stops swinging (c) yes, much slower (d) yes, much faster
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a battery cell (d) a ruler
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) True (b) False
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.⚖️ 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 same hook (c) time for 10 swings (d) how far we pull it back
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) False (b) True
11. 11.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) stopped (d) quicker
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
13. 13.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 39 seconds?
14. 14.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
15. 15.⚖️ 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) True (b) False
16. 16.⚖️ 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
17. 17.🧺 Which of these is not needed for the pendulum? (a) a string (b) a balloon (c) a ruler (d) a stopwatch
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a ruler (c) a stopwatch (d) a heavy nut or washer
19. 19.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
20. 20.True or false: a mirror is not needed for the pendulum. (a) False (b) True
21. 21.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) turmeric powder (c) a heavy nut or washer (d) a string
23. 23.True or false: a balloon is needed for the pendulum. (a) True (b) False
24. 24.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a magnet (c) a mirror (d) turmeric powder
25. 25.True or false: a ruler is needed for the pendulum. (a) True (b) False
26. 26.⚖️ 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
27. 27.⚖️ 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
28. 28.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is magnetic (c) it is hot (d) it is wet
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a pencil and tape (d) a mirror
31. 31.🧺 Which of these is needed for the pendulum? (a) yeast (b) a string (c) a magnet (d) a balloon
32. 32.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a pencil and tape (c) a mirror (d) turmeric powder
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a heavy nut or washer (d) yeast
34. 34.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 42 seconds?
35. 35.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
36. 36.True or false: a mirror is needed for the pendulum. (a) True (b) False
37. 37.⚖️ 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 same hook (c) how far we pull it back (d) the weight of the bob
38. 38.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we change it (c) we measure it
40. 40.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 14 seconds?

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