Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 100 · 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.⚖️ 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) how far we pull it back (c) time for 10 swings (d) the same hook
2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a heavy nut or washer (d) a mirror
3. 3.⚖️ 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
4. 4.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a magnet (c) a mirror (d) a stopwatch
5. 5.True or false: a string is needed for the pendulum. (a) False (b) True
6. 6.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) 10 is a lucky number (c) it is more fun (d) it is more accurate
7. 7.⚖️ 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 measure it (b) we keep it the same (c) we change it
8. 8.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a pencil and tape (d) a mirror
9. 9.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) yes, much faster (d) no, hardly at all
10. 10.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
11. 11.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a small nut or washer (d) a glass bottle
12. 12.⚖️ 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
13. 13.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) it cannot swing (d) about the same
14. 14.⚖️ 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 measure it (c) we change it
15. 15.⚖️ 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
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is kept the same. (a) False (b) True
17. 17.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) heavier (d) slower
18. 18.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the weight of the bob (c) how far we pull it back (d) time for 10 swings
20. 20.⚖️ 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
21. 21.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
22. 22.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 10 seconds?
23. 23.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
24. 24.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) True (b) False
26. 26.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
27. 27.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is magnetic (d) it is hot
28. 28.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a phone (c) a digital watch (d) a sundial
29. 29.True or false: yeast is needed for the pendulum. (a) True (b) False
30. 30.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
31. 31.True or false: a ruler is needed for the pendulum. (a) False (b) True
32. 32.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it stays the same (d) it becomes 4 times
33. 33.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
34. 34.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a battery cell (d) a heavy nut or washer
35. 35.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
36. 36.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
37. 37.⚖️ 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
38. 38.🧺 Which of these is needed for the pendulum? (a) yeast (b) a string (c) a magnet (d) turmeric powder
39. 39.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a longer string (d) a lighter bob
40. 40.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 17 seconds?

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