Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 974 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a mirror (d) a ruler
2. 2.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
3. 3.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
4. 4.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) it is hot (d) the bob could hit you
5. 5.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a digital watch (d) a grandfather clock
6. 6.⚖️ 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
7. 7.🔮 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
8. 8.⚖️ 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 keep it the same (c) we measure it
9. 9.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) slower (d) heavier
10. 10.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a heavy brick (d) a small nut or washer
11. 11.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) one swing is too slow (c) it is more fun (d) it is more accurate
12. 12.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) about the same (d) much slower
13. 13.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the string length (c) the same hook
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a stopwatch (d) turmeric powder
16. 16.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) it stops swinging (d) yes, much faster
17. 17.⚖️ 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
18. 18.⚖️ 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) the weight of the bob
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a stopwatch (c) a string (d) a ruler
20. 20.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
21. 21.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a stopwatch (d) a battery cell
22. 22.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
23. 23.True or false: yeast is not needed for the pendulum. (a) False (b) True
24. 24.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
25. 25.⚖️ 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
26. 26.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
27. 27.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a stopwatch (c) a ruler (d) a string
28. 28.🧺 Which of these is needed for the pendulum? (a) a string (b) a battery cell (c) a magnet (d) turmeric powder
29. 29.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
30. 30.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
31. 31.🧺 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 magnet (d) a string
32. 32.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a balloon (d) a string
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) True (b) False
35. 35.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a stopwatch (d) a mirror
36. 36.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
37. 37.⚖️ 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 string length (c) time for 10 swings (d) the same hook
38. 38.⚖️ 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
39. 39.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a balloon (c) a ruler (d) a string
40. 40.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed

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