Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 715 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a battery cell (c) a pencil and tape (d) a string
2. 2.⚖️ 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
3. 3.⚖️ 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
4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
5. 5.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it becomes 4 times (d) it stays the same
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a ruler (d) yeast
7. 7.True or false: a string is needed for the pendulum. (a) False (b) True
8. 8.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) the string (d) magnetism
9. 9.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) turmeric powder (d) a string
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the same hook (c) how far we pull it back (d) the weight of the bob
12. 12.True or false: a mirror is not needed for the pendulum. (a) False (b) True
13. 13.⚖️ 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
14. 14.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 34 seconds?
15. 15.⚖️ 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
16. 16.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a magnet (c) a string (d) a heavy nut or washer
17. 17.True or false: yeast is not needed for the pendulum. (a) True (b) False
18. 18.🔮 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
19. 19.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a longer string (d) a lighter bob
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) True (b) False
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.🧺 Which of these is needed for the pendulum? (a) a string (b) a balloon (c) a mirror (d) a battery cell
23. 23.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a pencil and tape (c) turmeric powder (d) a magnet
24. 24.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
25. 25.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
26. 26.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 24 seconds?
27. 27.True or false: a mirror is needed for the pendulum. (a) True (b) False
28. 28.🛟 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
29. 29.⚖️ 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
30. 30.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
31. 31.⚖️ 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) the string length (c) time for 10 swings (d) the same hook
32. 32.True or false: a ruler is not needed for the pendulum. (a) True (b) False
33. 33.⚖️ 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 measure it (c) we keep it the same
34. 34.True or false: a magnet is not needed for the pendulum. (a) True (b) False
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a mirror (d) a string
36. 36.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
37. 37.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a string (c) a ruler (d) a heavy nut or washer
38. 38.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
39. 39.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) yeast (d) a string
40. 40.⚖️ 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 measure it (c) we change it

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