Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 870 · 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.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
2. 2.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
3. 3.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is hot (d) it is magnetic
4. 4.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False
6. 6.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
7. 7.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a string (d) a battery cell
8. 8.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a lighter bob (d) a longer string
9. 9.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
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 measure it (b) we change it (c) we keep it the same
11. 11.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a string (d) yeast
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we change it (c) we keep it the same
13. 13.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it stays the same (d) it doubles
14. 14.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) stopped (d) quicker
15. 15.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a stopwatch (d) a balloon
16. 16.True or false: a battery cell is needed for the pendulum. (a) False (b) True
17. 17.⚖️ 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) the string length (d) the same hook
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) time for 10 swings (c) the weight of the bob (d) how far we pull it back
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a ruler (d) a battery cell
20. 20.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
21. 21.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
22. 22.⚖️ 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 keep it the same (b) we change it (c) we measure it
23. 23.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
24. 24.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a glass bottle (d) a small nut or washer
25. 25.⚖️ 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 measure it (c) we keep it the same
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
27. 27.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
28. 28.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) much slower (d) it cannot swing
29. 29.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
30. 30.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
32. 32.⚖️ 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 change it (c) we measure it
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a pencil and tape (c) a heavy nut or washer (d) a ruler
34. 34.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) a magnet (d) turmeric powder
35. 35.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 14 seconds?
36. 36.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 13 seconds?
37. 37.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
38. 38.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a mirror (d) a string
40. 40.True or false: a string is not needed for the pendulum. (a) False (b) True

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