Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 140 · 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 battery cell for the pendulum? (a) not needed (b) needed
2. 2.⚖️ 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 change it (c) we measure it
3. 3.⚖️ 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
4. 4.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a ruler (c) a string (d) a heavy nut or washer
5. 5.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
6. 6.True or false: a magnet is not needed for the pendulum. (a) False (b) True
7. 7.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a heavy nut or washer (d) a battery cell
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the weight of the bob (c) how far we pull it back (d) time for 10 swings
9. 9.🔮 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
10. 10.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
11. 11.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a stopwatch (d) yeast
12. 12.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
13. 13.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a battery cell (c) a stopwatch (d) a ruler
15. 15.⚖️ 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
16. 16.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
17. 17.⚖️ 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
18. 18.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
19. 19.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) about the same (d) much faster
20. 20.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a heavy nut or washer (d) a battery cell
21. 21.⚖️ 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 string length (c) the weight of the bob (d) the same hook
22. 22.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
23. 23.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 18 seconds?
24. 24.True or false: a mirror is needed for the pendulum. (a) False (b) True
25. 25.True or false: a string is not needed for the pendulum. (a) True (b) False
26. 26.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a lighter bob (d) a shorter string
27. 27.⚖️ 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
28. 28.⚖️ 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
29. 29.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
30. 30.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a ruler (c) a pencil and tape (d) a string
31. 31.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) gravity (d) magnetism
32. 32.True or false: a battery cell is needed for the pendulum. (a) True (b) False
33. 33.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a heavy brick (c) a glass bottle (d) a sharp tool
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) turmeric powder (d) a heavy nut or washer
35. 35.True or false: a balloon is not needed for the pendulum. (a) True (b) False
36. 36.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much faster (d) yes, much slower
37. 37.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
38. 38.⚖️ 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 measure it (c) we change it
39. 39.🧺 Which of these is needed for the pendulum? (a) a ruler (b) turmeric powder (c) a magnet (d) a mirror
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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