Simple Pendulum Experiment Worksheet

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

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