Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 238 · 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.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it becomes 4 times (c) it halves (d) it stays the same
2. 2.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) about the same (c) much faster (d) much slower
3. 3.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
4. 4.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) a pencil and tape (d) a balloon
5. 5.True or false: a balloon is needed for the pendulum. (a) False (b) True
6. 6.True or false: a mirror is not needed for the pendulum. (a) False (b) True
7. 7.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a grandfather clock (d) a sundial
8. 8.⚖️ 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 same hook (c) the weight of the bob (d) the string length
9. 9.True or false: a string is not needed for the pendulum. (a) False (b) True
10. 10.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
11. 11.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
12. 12.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a ruler (d) a magnet
14. 14.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a stopwatch (c) a battery cell (d) a string
15. 15.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
16. 16.🧺 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
17. 17.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) quicker (d) heavier
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we keep it the same (c) we change it
19. 19.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
20. 20.⚖️ 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 change it (b) we measure it (c) we keep it the same
21. 21.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
22. 22.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a heavy brick (d) a sharp tool
23. 23.⚖️ 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 keep it the same (c) we change it
24. 24.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) one swing is too slow (c) it is more fun (d) 10 is a lucky number
25. 25.True or false: a ruler is needed for the pendulum. (a) True (b) False
26. 26.⚖️ 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
27. 27.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is magnetic (c) it is wet (d) it is hot
28. 28.🧺 Which of these is needed for the pendulum? (a) yeast (b) turmeric powder (c) a ruler (d) a balloon
29. 29.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is kept the same. (a) True (b) False
31. 31.⚖️ 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
32. 32.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) how far we pull it back (c) the string length (d) time for 10 swings
34. 34.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the wind (d) the string
35. 35.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a stopwatch (d) a battery cell
37. 37.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
38. 38.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a ruler (c) a pencil and tape (d) a heavy nut or washer
39. 39.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) no, hardly at all (d) yes, much faster
40. 40.🧺 Which of these is needed for the pendulum? (a) a string (b) a magnet (c) yeast (d) turmeric powder

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