Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 734 · 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.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a sundial (d) a grandfather clock
2. 2.⚖️ 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) time for 10 swings (d) the string length
3. 3.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
4. 4.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
5. 5.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a heavy brick (d) a glass bottle
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a pencil and tape (d) a battery cell
7. 7.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
8. 8.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) it cannot swing (c) much faster (d) much slower
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a mirror (d) a stopwatch
10. 10.🔮 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
11. 11.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) heavier (d) stopped
12. 12.⚖️ 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 change it (c) we keep it the same
13. 13.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a battery cell (c) turmeric powder (d) yeast
14. 14.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a balloon (d) a ruler
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
17. 17.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
18. 18.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a pencil and tape (c) a heavy nut or washer (d) a stopwatch
19. 19.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) no, hardly at all (c) yes, much slower (d) it stops swinging
20. 20.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
21. 21.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
22. 22.True or false: a string is needed for the pendulum. (a) True (b) False
23. 23.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) turmeric powder (c) a balloon (d) a battery cell
24. 24.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
25. 25.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is wet (d) it is magnetic
26. 26.⚖️ 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
27. 27.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) a heavy nut or washer (d) turmeric powder
28. 28.⚖️ 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
29. 29.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a longer string (d) a heavier bob
30. 30.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) it is more accurate (c) 10 is a lucky number (d) one swing is too slow
31. 31.⚖️ 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) False (b) True
32. 32.True or false: a magnet is needed for the pendulum. (a) True (b) False
33. 33.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a pencil and tape (c) a balloon (d) a magnet
34. 34.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a battery cell (c) a string (d) yeast
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 takes 1 second for one swing. How many swings does it make in 13 seconds?
37. 37.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a stopwatch (c) a string (d) a pencil and tape
38. 38.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
39. 39.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
40. 40.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?

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