Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 40 · 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.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) much faster (d) about the same
2. 2.🔮 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 becomes 4 times (d) it doubles
3. 3.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a small nut or washer (d) a sharp tool
4. 4.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) it is more accurate (d) 10 is a lucky number
5. 5.True or false: yeast is needed for the pendulum. (a) False (b) True
6. 6.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
7. 7.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) turmeric powder (c) a mirror (d) a magnet
8. 8.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
9. 9.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a heavy nut or washer (d) yeast
10. 10.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
11. 11.True or false: a ruler is not needed for the pendulum. (a) False (b) True
12. 12.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
13. 13.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 54 seconds?
14. 14.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) turmeric powder (c) a battery cell (d) yeast
15. 15.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
16. 16.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
17. 17.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) turmeric powder (d) a pencil and tape
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a heavy nut or washer (c) a ruler (d) a string
19. 19.⚖️ 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 string length (c) how far we pull it back (d) the same hook
20. 20.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
21. 21.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a stopwatch (c) a ruler (d) a pencil and tape
22. 22.🧺 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 string (d) a battery cell
23. 23.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
24. 24.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) yeast (d) a string
25. 25.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the weight of the bob (c) how far we pull it back (d) time for 10 swings
27. 27.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a phone (d) a digital watch
28. 28.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
29. 29.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
30. 30.⚖️ 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 keep it the same (c) we change it
31. 31.⚖️ 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) False (b) True
32. 32.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) stopped (c) slower (d) heavier
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a stopwatch (c) a pencil and tape (d) a ruler
34. 34.True or false: a mirror is needed for the pendulum. (a) False (b) True
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
36. 36.⚖️ 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) False (b) True
37. 37.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) turmeric powder (d) a heavy nut or washer
39. 39.⚖️ 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
40. 40.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed

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