Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 790 · 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.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
2. 2.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) quicker (d) stopped
3. 3.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) 10 is a lucky number (d) one swing is too slow
4. 4.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
5. 5.⚖️ 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 string length (c) the same hook (d) how far we pull it back
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is kept the same. (a) True (b) False
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the same hook (c) time for 10 swings
8. 8.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
9. 9.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
10. 10.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
11. 11.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it stays the same (c) it becomes 4 times (d) it halves
12. 12.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a stopwatch (d) turmeric powder
13. 13.⚖️ 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
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a string (d) a mirror
15. 15.⚖️ 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
16. 16.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) yes, much faster (d) it stops swinging
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.⚖️ 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 string length (c) the same hook (d) how far we pull it back
19. 19.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a stopwatch (c) a ruler (d) a string
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) yeast (d) a string
22. 22.⚖️ 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
23. 23.True or false: a ruler is not needed for the pendulum. (a) False (b) True
24. 24.⚖️ 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
25. 25.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) a string (d) a ruler
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.True or false: a battery cell is needed for the pendulum. (a) True (b) False
28. 28.⚖️ 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) False (b) True
29. 29.True or false: a string is needed for the pendulum. (a) False (b) True
30. 30.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
31. 31.True or false: a magnet is not needed for the pendulum. (a) False (b) True
32. 32.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
33. 33.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) a heavy nut or washer (d) a battery cell
34. 34.True or false: a balloon is not needed for the pendulum. (a) False (b) True
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
36. 36.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
37. 37.True or false: a string is not needed for the pendulum. (a) False (b) True
38. 38.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a string (d) a balloon
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a battery cell (d) a heavy nut or washer
40. 40.🧺 Do we need a string for the pendulum? (a) not needed (b) needed

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