Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 443 · 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.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
2. 2.🛟 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
3. 3.True or false: a ruler is not needed for the pendulum. (a) False (b) True
4. 4.🧺 Which of these is needed for the pendulum? (a) a mirror (b) yeast (c) a heavy nut or washer (d) a battery cell
5. 5.🔮 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
6. 6.⚖️ 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
7. 7.⚖️ 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
8. 8.🛟 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
9. 9.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
10. 10.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) yeast (d) a string
11. 11.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a balloon (c) a heavy nut or washer (d) a string
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a pencil and tape (c) a heavy nut or washer (d) a ruler
13. 13.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a ruler (c) turmeric powder (d) a magnet
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a balloon (d) a stopwatch
15. 15.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
16. 16.True or false: a string is needed for the pendulum. (a) True (b) False
17. 17.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the same hook (c) the weight of the bob (d) time for 10 swings
20. 20.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a longer string (d) a heavier bob
21. 21.⚖️ 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
22. 22.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
23. 23.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
24. 24.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a pencil and tape (d) a mirror
26. 26.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
27. 27.True or false: a string is not needed for the pendulum. (a) True (b) False
28. 28.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it halves (c) it doubles (d) it stays the same
29. 29.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) a mirror (d) a pencil and tape
30. 30.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 51 seconds?
31. 31.⚖️ 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
32. 32.⚖️ 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
33. 33.True or false: yeast is needed for the pendulum. (a) False (b) True
34. 34.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) a magnet (d) a ruler
35. 35.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a ruler (c) a string (d) a stopwatch
37. 37.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a string (d) a magnet
38. 38.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a stopwatch (c) a heavy nut or washer (d) a string
39. 39.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
40. 40.⚖️ 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

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