Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 217 · 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 of these is not needed for the pendulum? (a) a stopwatch (b) a balloon (c) a heavy nut or washer (d) a pencil and tape
2. 2.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
3. 3.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) the bob could hit you (d) it is magnetic
4. 4.⚖️ 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 weight of the bob (c) the string length (d) the same hook
5. 5.🧺 Which of these is needed for the pendulum? (a) a string (b) yeast (c) a mirror (d) turmeric powder
6. 6.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
7. 7.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) turmeric powder (d) a ruler
8. 8.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
9. 9.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) the wind (d) gravity
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we change it (c) we measure it
11. 11.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it becomes 4 times (d) it stays the same
12. 12.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) 10 is a lucky number (d) it is more accurate
13. 13.⚖️ 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
14. 14.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a phone (d) a digital watch
15. 15.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a ruler (c) a stopwatch (d) a battery cell
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.True or false: a balloon is needed for the pendulum. (a) False (b) True
18. 18.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) stopped (d) quicker
19. 19.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) it cannot swing (c) about the same (d) much faster
20. 20.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a heavy brick (d) a sharp tool
21. 21.⚖️ 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
22. 22.⚖️ 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
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a balloon (d) a heavy nut or washer
24. 24.True or false: yeast is not needed for the pendulum. (a) False (b) True
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) time for 10 swings (c) the string length
26. 26.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a longer string (d) a heavier bob
27. 27.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) no, hardly at all (d) yes, much faster
28. 28.⚖️ 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) the weight of the bob
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a pencil and tape (d) yeast
30. 30.⚖️ 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) how far we pull it back (c) the string length
31. 31.⚖️ 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 change it (b) we keep it the same (c) we measure it
32. 32.⚖️ 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
33. 33.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
34. 34.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we keep it the same (c) we measure it
36. 36.⚖️ 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
37. 37.True or false: a string is needed for the pendulum. (a) False (b) True
38. 38.True or false: a battery cell is needed for the pendulum. (a) False (b) True
39. 39.True or false: a string is not needed for the pendulum. (a) False (b) True
40. 40.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a stopwatch (c) a string (d) a pencil and tape

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