Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 505 · 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 not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) a heavy nut or washer (d) a balloon
2. 2.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a heavy brick (d) a glass bottle
3. 3.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
4. 4.⚖️ 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
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a string (d) turmeric powder
6. 6.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
7. 7.⚖️ 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) time for 10 swings
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we change it (c) we keep it the same
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) time for 10 swings (c) the string length
10. 10.True or false: a mirror is not needed for the pendulum. (a) True (b) False
11. 11.⚖️ 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
12. 12.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
13. 13.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
14. 14.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is wet (d) it is magnetic
15. 15.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a stopwatch (c) a heavy nut or washer (d) a string
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a stopwatch (d) a battery cell
17. 17.⚖️ 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
18. 18.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) heavier (d) slower
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a pencil and tape (d) yeast
20. 20.True or false: a string is not needed for the pendulum. (a) False (b) True
21. 21.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a string (c) a heavy nut or washer (d) a stopwatch
23. 23.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 51 seconds?
24. 24.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) it cannot swing (d) about the same
25. 25.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) a pencil and tape (d) a battery cell
26. 26.⚖️ 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) how far we pull it back
27. 27.⚖️ 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
28. 28.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
29. 29.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
30. 30.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) the string (d) gravity
31. 31.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it doubles (c) it becomes 4 times (d) it halves
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a balloon (c) a ruler (d) a pencil and tape
33. 33.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a ruler (d) a mirror
35. 35.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
36. 36.⚖️ 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 weight of the bob (c) time for 10 swings (d) how far we pull it back
37. 37.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a string (c) a ruler (d) a stopwatch
38. 38.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
39. 39.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) one swing is too slow (d) it is more accurate
40. 40.True or false: turmeric powder is needed for the pendulum. (a) False (b) True

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