Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 259 · 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 pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
2. 2.🧺 Which of these is needed for the pendulum? (a) yeast (b) turmeric powder (c) a ruler (d) a balloon
3. 3.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a ruler (c) a stopwatch (d) a string
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we keep it the same (c) we measure it
5. 5.🔮 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
6. 6.🛟 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
7. 7.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more accurate (c) 10 is a lucky number (d) it is more fun
8. 8.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
9. 9.⚖️ 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
10. 10.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) gravity (d) the wind
11. 11.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) slower (d) stopped
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a battery cell (d) a heavy nut or washer
13. 13.⚖️ 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) the weight of the bob
14. 14.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
15. 15.True or false: a string is needed for the pendulum. (a) True (b) False
16. 16.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
17. 17.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
18. 18.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it stays the same (d) it becomes 4 times
19. 19.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) a stopwatch (d) yeast
20. 20.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a string (c) a pencil and tape (d) a heavy nut or washer
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a heavy nut or washer (d) a magnet
22. 22.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
23. 23.True or false: a battery cell is needed for the pendulum. (a) False (b) True
24. 24.⚖️ 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
25. 25.⚖️ 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 keep it the same (b) we measure it (c) we change it
26. 26.⚖️ 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
27. 27.True or false: a ruler is needed for the pendulum. (a) False (b) True
28. 28.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) yeast (c) a magnet (d) a stopwatch
29. 29.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings 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 the one thing we change? (a) the weight of the bob (b) time for 10 swings (c) how far we pull it back (d) the string length
32. 32.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
33. 33.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a pencil and tape (c) a mirror (d) turmeric powder
34. 34.⚖️ 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) True (b) False
35. 35.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
36. 36.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 54 seconds?
37. 37.True or false: a mirror is needed for the pendulum. (a) False (b) True
38. 38.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
39. 39.True or false: a balloon is needed for the pendulum. (a) True (b) False
40. 40.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) yeast (c) turmeric powder (d) a heavy nut or washer

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