Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 656 · 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.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) it is wet (d) the bob could hit you
2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a ruler (c) a stopwatch (d) a heavy nut or washer
3. 3.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) stopped (d) quicker
4. 4.True or false: a balloon is not needed for the pendulum. (a) False (b) True
5. 5.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
6. 6.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) turmeric powder (d) a string
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we change it (c) we keep it the same
8. 8.⚖️ 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
9. 9.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a string (c) a ruler (d) a stopwatch
10. 10.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
11. 11.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) magnetism (d) gravity
12. 12.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
13. 13.True or false: a ruler is not needed for the pendulum. (a) True (b) False
14. 14.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
15. 15.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a glass bottle (d) a heavy brick
16. 16.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) how far we pull it back (c) the same hook (d) the string length
18. 18.⚖️ 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
19. 19.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
20. 20.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it becomes 4 times (d) it stays the same
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) False (b) True
22. 22.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much faster (c) no, hardly at all (d) yes, much slower
23. 23.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 26 seconds?
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a heavy nut or washer (d) a mirror
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) True (b) False
26. 26.True or false: yeast is not needed for the pendulum. (a) True (b) False
27. 27.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) a ruler (d) a balloon
28. 28.True or false: a battery cell is needed for the pendulum. (a) False (b) True
29. 29.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a magnet (c) a string (d) a stopwatch
30. 30.True or false: a magnet is not needed for the pendulum. (a) True (b) False
31. 31.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a battery cell (d) a stopwatch
32. 32.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
33. 33.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
34. 34.⚖️ 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
35. 35.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) it is more accurate (d) 10 is a lucky number
36. 36.⚖️ 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
37. 37.⚖️ 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
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) yeast (c) a pencil and tape (d) a stopwatch
39. 39.⚖️ 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) the string length (c) time for 10 swings
40. 40.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?

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