Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 544 · 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 pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) gravity (d) the wind
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
3. 3.🧺 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 battery cell
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a stopwatch (d) a balloon
5. 5.⚖️ 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
6. 6.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) heavier (d) stopped
7. 7.⚖️ 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
8. 8.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
9. 9.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) the bob could hit you (d) it is wet
10. 10.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a heavy nut or washer (c) a mirror (d) a balloon
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the string length (c) the weight of the bob (d) how far we pull it back
12. 12.True or false: a mirror is not needed for the pendulum. (a) False (b) True
13. 13.True or false: yeast is needed for the pendulum. (a) False (b) True
14. 14.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
15. 15.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
16. 16.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
17. 17.⚖️ 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) True (b) False
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) yeast (d) a string
19. 19.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it doubles (d) it halves
20. 20.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a mirror (c) turmeric powder (d) a ruler
21. 21.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 33 seconds?
22. 22.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a magnet (c) a stopwatch (d) a string
24. 24.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
25. 25.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) it is more accurate (c) one swing is too slow (d) 10 is a lucky number
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the same hook (c) time for 10 swings (d) how far we pull it back
27. 27.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
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) how far we pull it back
29. 29.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a ruler (c) a pencil and tape (d) a stopwatch
30. 30.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 18 seconds?
31. 31.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
32. 32.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
33. 33.⚖️ 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 weight of the bob (c) the string length
34. 34.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
35. 35.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 11 seconds?
36. 36.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a string (c) a magnet (d) a battery cell
37. 37.⚖️ 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
38. 38.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) yeast (c) a ruler (d) a stopwatch
39. 39.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a small nut or washer (d) a heavy brick
40. 40.⚖️ 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

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