Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 458 · 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 sharp tool (c) a glass bottle (d) a small nut or washer
2. 2.⚖️ 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
3. 3.⚖️ 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
4. 4.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
5. 5.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
6. 6.True or false: a string is not needed for the pendulum. (a) False (b) True
7. 7.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
8. 8.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
9. 9.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
10. 10.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
11. 11.True or false: a ruler is not needed for the pendulum. (a) False (b) True
12. 12.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) time for 10 swings (c) the weight of the bob (d) the same hook
14. 14.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a pencil and tape (c) a ruler (d) a heavy nut or washer
15. 15.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a string (c) a magnet (d) a balloon
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a heavy nut or washer (d) yeast
17. 17.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it doubles (c) it becomes 4 times (d) it halves
18. 18.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
19. 19.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
20. 20.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a heavy nut or washer (d) a balloon
21. 21.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a ruler (c) a stopwatch (d) a heavy nut or washer
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a magnet (d) a pencil and tape
23. 23.True or false: a string is needed for the pendulum. (a) False (b) True
24. 24.⚖️ 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) how far we pull it back (d) the string length
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a pencil and tape (d) a mirror
26. 26.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) no, hardly at all (d) yes, much faster
27. 27.⚖️ 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 string length (c) the same hook
28. 28.⚖️ 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 string length (c) the weight of the bob
29. 29.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) stopped (d) quicker
30. 30.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) a battery cell (d) a stopwatch
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we change it (c) we keep it the same
32. 32.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
33. 33.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
34. 34.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 33 seconds?
35. 35.⚖️ 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
36. 36.🧺 Which of these is needed for the pendulum? (a) a balloon (b) turmeric powder (c) a pencil and tape (d) yeast
37. 37.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) 10 is a lucky number (d) it is more accurate
38. 38.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
39. 39.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we measure it (c) we keep it the same

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