Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 401 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a magnet (d) a pencil and tape
2. 2.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a magnet (d) a stopwatch
3. 3.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
4. 4.🧺 Which of these is needed for the pendulum? (a) a mirror (b) yeast (c) a balloon (d) a pencil and tape
5. 5.⚖️ 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
6. 6.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) yeast (c) a string (d) a heavy nut or washer
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.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
9. 9.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a small nut or washer (d) a sharp tool
10. 10.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a balloon (d) a pencil and tape
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a battery cell (c) a string (d) a ruler
13. 13.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a lighter bob (d) a longer string
14. 14.True or false: a string is not needed for the pendulum. (a) True (b) False
15. 15.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 11 seconds?
16. 16.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) stopped (d) quicker
17. 17.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
18. 18.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) the bob could hit you (d) it is hot
19. 19.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 38 seconds?
20. 20.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
21. 21.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
22. 22.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) 10 is a lucky number (c) it is more fun (d) one swing is too slow
23. 23.🧺 Which of these is needed for the pendulum? (a) a balloon (b) turmeric powder (c) a magnet (d) a stopwatch
24. 24.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 60 seconds?
25. 25.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a mirror (d) a string
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.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) time for 10 swings (c) how far we pull it back (d) the weight of the bob
29. 29.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
30. 30.🔮 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
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) False (b) True
32. 32.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
33. 33.True or false: a balloon is needed for the pendulum. (a) True (b) False
34. 34.⚖️ 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
35. 35.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a digital watch (d) a grandfather clock
36. 36.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
37. 37.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
38. 38.⚖️ 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) True (b) False
39. 39.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) yes, much faster (d) no, hardly at all
40. 40.⚖️ 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

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