Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 335 · 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.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
2. 2.⚖️ 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 measure it (c) we change it
3. 3.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) stopped (d) quicker
5. 5.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it halves (d) it doubles
6. 6.⚖️ 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) the same hook (c) how far we pull it back (d) the string length
7. 7.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) much slower (d) it cannot swing
8. 8.True or false: a string is not needed for the pendulum. (a) False (b) True
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a magnet (d) a string
10. 10.⚖️ 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 string length (c) the same hook (d) the weight of the bob
11. 11.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a battery cell (c) turmeric powder (d) a balloon
12. 12.⚖️ 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) False (b) True
13. 13.⚖️ 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
14. 14.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
15. 15.True or false: a ruler is not needed for the pendulum. (a) False (b) True
16. 16.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
17. 17.⚖️ 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 same hook (c) the string length
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) how far we pull it back (c) time for 10 swings
19. 19.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
20. 20.True or false: a magnet is not needed for the pendulum. (a) True (b) False
21. 21.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a heavy brick (d) a small nut or washer
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a ruler (c) a string (d) a heavy nut or washer
23. 23.⚖️ 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
24. 24.⚖️ 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 keep it the same (c) we measure it
25. 25.True or false: a balloon is needed for the pendulum. (a) True (b) False
26. 26.🧺 Which of these is needed for the pendulum? (a) a mirror (b) turmeric powder (c) a ruler (d) a magnet
27. 27.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) 10 is a lucky number (c) it is more accurate (d) it is more fun
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a stopwatch (c) a ruler (d) a string
29. 29.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a ruler (d) yeast
30. 30.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a grandfather clock (d) a sundial
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a battery cell (c) a ruler (d) a heavy nut or washer
32. 32.⚖️ 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) False (b) True
33. 33.⚖️ 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
34. 34.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much slower (d) yes, much faster
35. 35.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
36. 36.True or false: yeast is not needed for the pendulum. (a) False (b) True
37. 37.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
38. 38.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
39. 39.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 26 seconds?
40. 40.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?

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