Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 459 · 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 takes 3 seconds for one swing. How many swings does it make in 21 seconds?
2. 2.⚖️ 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
3. 3.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) about the same (c) much faster (d) much slower
4. 4.True or false: yeast is needed for the pendulum. (a) False (b) True
5. 5.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) the bob could hit you (d) it is wet
6. 6.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) the wind (c) magnetism (d) gravity
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) time for 10 swings (c) the weight of the bob
8. 8.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) yes, much slower (d) no, hardly at all
9. 9.🕰️ 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 accurate (d) it is more fun
10. 10.⚖️ 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) how far we pull it back
11. 11.⚖️ 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
12. 12.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a small nut or washer (d) a heavy brick
13. 13.⚖️ 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) False (b) True
14. 14.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) yeast (c) a string (d) a heavy nut or washer
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we measure it (c) we change it
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a battery cell (c) a ruler (d) a stopwatch
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we keep it the same (c) we measure it
19. 19.True or false: a ruler is needed for the pendulum. (a) False (b) True
20. 20.⚖️ 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
21. 21.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
22. 22.⚖️ 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
23. 23.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a digital watch (d) a grandfather clock
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) how far we pull it back (c) the string length (d) time for 10 swings
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a stopwatch (d) a magnet
26. 26.⚖️ 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 same hook (c) the string length
27. 27.⚖️ 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
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) the weight of the bob (c) time for 10 swings (d) how far we pull it back
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
30. 30.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
31. 31.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
32. 32.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
33. 33.True or false: a mirror is not needed for the pendulum. (a) False (b) True
34. 34.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
35. 35.🧺 Which of these is needed for the pendulum? (a) yeast (b) a string (c) a mirror (d) a battery cell
36. 36.True or false: a ruler is not needed for the pendulum. (a) False (b) True
37. 37.🔮 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 halves (d) it becomes 4 times
38. 38.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a shorter string (d) a longer string
39. 39.⚖️ 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
40. 40.⚖️ 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) True (b) False

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