Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 371 · 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 halves (b) it stays the same (c) it doubles (d) it becomes 4 times
2. 2.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is magnetic (c) it is hot (d) it is wet
3. 3.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a magnet (c) yeast (d) a battery cell
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a mirror (c) a heavy nut or washer (d) a stopwatch
5. 5.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) turmeric powder (d) a heavy nut or washer
7. 7.⚖️ 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
8. 8.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) slower (d) quicker
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we change it (c) we measure it
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) yeast (d) a ruler
11. 11.⚖️ 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 string length (c) time for 10 swings (d) the weight of the bob
12. 12.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the weight of the bob (c) the same hook (d) the string length
14. 14.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
15. 15.True or false: a string is needed for the pendulum. (a) False (b) True
16. 16.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) yes, much faster (d) no, hardly at all
17. 17.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a pencil and tape (d) turmeric powder
18. 18.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
19. 19.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a digital watch (d) a sundial
20. 20.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
21. 21.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
22. 22.⚖️ 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 weight of the bob
23. 23.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) much slower (d) about the same
24. 24.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a heavy nut or washer (d) a mirror
25. 25.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
26. 26.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a magnet (c) a pencil and tape (d) yeast
27. 27.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) it is more accurate (c) one swing is too slow (d) 10 is a lucky number
28. 28.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
29. 29.🧺 Do we need yeast 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: the string length is what we measure. (a) True (b) False
31. 31.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
32. 32.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a balloon (c) a ruler (d) a heavy nut or washer
33. 33.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a heavy brick (d) a glass bottle
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a heavy nut or washer (d) a magnet
35. 35.🧺 Which of these is needed for the pendulum? (a) a string (b) a balloon (c) turmeric powder (d) a magnet
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a balloon (c) a string (d) a heavy nut or washer
37. 37.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
38. 38.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 13 seconds?
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a heavy nut or washer (c) a pencil and tape (d) a string
40. 40.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a lighter bob (d) a longer string

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