Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 457 · 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? What do we do with “time for 10 swings”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a stopwatch (c) turmeric powder (d) a balloon
3. 3.🔮 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
4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) heavier (d) stopped
5. 5.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) the string (d) magnetism
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a magnet (c) a ruler (d) a stopwatch
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.⚖️ 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
9. 9.⚖️ 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
10. 10.⚖️ 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) True (b) False
11. 11.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
12. 12.🔮 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
13. 13.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a glass bottle (d) a sharp tool
14. 14.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
15. 15.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) turmeric powder (d) a stopwatch
16. 16.True or false: yeast is not needed for the pendulum. (a) True (b) False
17. 17.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a grandfather clock (d) a digital watch
18. 18.⚖️ 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 measure it (c) we keep it the same
19. 19.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
20. 20.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a ruler (d) yeast
22. 22.⚖️ 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
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) how far we pull it back (c) time for 10 swings (d) the string length
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the weight of the bob (c) time for 10 swings
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a string (d) a mirror
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) the string length (c) time for 10 swings
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) turmeric powder (c) a string (d) a stopwatch
28. 28.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
29. 29.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
30. 30.True or false: a balloon is not needed for the pendulum. (a) True (b) False
31. 31.True or false: a balloon is needed for the pendulum. (a) False (b) True
32. 32.True or false: a string is not needed for the pendulum. (a) True (b) False
33. 33.⚖️ 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
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the same hook (c) the weight of the bob (d) the string length
35. 35.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
36. 36.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a battery cell (d) a heavy nut or washer
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we change it (c) we keep it the same
38. 38.🛟 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
39. 39.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) yeast (d) a stopwatch
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a balloon (c) a stopwatch (d) a heavy nut or washer

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