Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 104 · 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? True or false: the string length is the one thing we change. (a) False (b) True
2. 2.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
3. 3.⚖️ 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 keep it the same (c) we change it
4. 4.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
5. 5.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
6. 6.⚖️ 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
7. 7.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) stopped (c) slower (d) heavier
8. 8.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
9. 9.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) about the same (d) it cannot swing
10. 10.⚖️ 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
11. 11.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a ruler (c) a mirror (d) a magnet
12. 12.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
13. 13.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
14. 14.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 57 seconds?
15. 15.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it becomes 4 times (d) it doubles
16. 16.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
17. 17.⚖️ 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
18. 18.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
19. 19.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
20. 20.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a grandfather clock (d) a digital watch
21. 21.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is wet (d) it is hot
22. 22.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a glass bottle (d) a heavy brick
23. 23.⚖️ 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
24. 24.⚖️ 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
25. 25.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a string (d) a battery cell
26. 26.⚖️ 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 measure it (c) we keep it the same
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a string (c) a heavy nut or washer (d) a pencil and tape
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a string (c) a pencil and tape (d) a ruler
29. 29.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a magnet (c) turmeric powder (d) a heavy nut or washer
30. 30.🧺 Which of these is needed for the pendulum? (a) yeast (b) a pencil and tape (c) a magnet (d) a balloon
31. 31.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
32. 32.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) turmeric powder (c) a ruler (d) a string
34. 34.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
35. 35.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
36. 36.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) yes, much faster (d) it stops swinging
37. 37.⚖️ 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 string length (c) the same hook
38. 38.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 51 seconds?
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) True (b) False
40. 40.⚖️ 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

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