Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 210 · 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.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a string (c) a magnet (d) yeast
2. 2.True or false: yeast is not needed for the pendulum. (a) False (b) True
3. 3.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a stopwatch (d) a magnet
5. 5.🧺 Which of these is needed for the pendulum? (a) a ruler (b) yeast (c) a magnet (d) a balloon
6. 6.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a lighter bob (d) a longer string
7. 7.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
8. 8.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 13 seconds?
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
10. 10.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the same hook
12. 12.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it halves (d) it doubles
13. 13.⚖️ 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
14. 14.⚖️ 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
15. 15.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is wet (d) it is magnetic
16. 16.True or false: a balloon is needed for the pendulum. (a) False (b) True
17. 17.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) magnetism (d) the wind
18. 18.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a heavy brick (d) a small nut or washer
19. 19.True or false: a mirror is needed for the pendulum. (a) True (b) False
20. 20.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
21. 21.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 18 seconds?
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the same hook (c) the weight of the bob (d) time for 10 swings
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we measure it (c) we change it
24. 24.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
25. 25.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
26. 26.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a string (c) a pencil and tape (d) a ruler
27. 27.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a battery cell (d) a heavy nut or washer
28. 28.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a string (d) a mirror
30. 30.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
31. 31.⚖️ 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
32. 32.⚖️ 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
33. 33.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a stopwatch (d) a magnet
34. 34.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
35. 35.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) how far we pull it back (c) time for 10 swings
37. 37.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a stopwatch (c) a pencil and tape (d) a string
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) a ruler (d) yeast
39. 39.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) much slower (d) about the same
40. 40.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) no, hardly at all (d) yes, much faster

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