Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 409 · 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 stopwatch (b) a mirror (c) a ruler (d) a string
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we measure it (c) we change it
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the string length (c) the weight of the bob (d) how far we pull it back
4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) slower (d) stopped
5. 5.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
6. 6.⚖️ 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 measure it (b) we change it (c) we keep it the same
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a ruler (d) a balloon
8. 8.⚖️ 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
9. 9.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
10. 10.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
11. 11.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
12. 12.⚖️ 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 measure it (c) we change it
13. 13.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
14. 14.🔮 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 doubles (d) it halves
15. 15.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 13 seconds?
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a string (d) yeast
17. 17.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
18. 18.⚖️ 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
19. 19.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a heavy brick (d) a glass bottle
20. 20.⚖️ 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
21. 21.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) a stopwatch (d) yeast
22. 22.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) time for 10 swings (c) how far we pull it back (d) the string length
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a stopwatch (c) a pencil and tape (d) a string
25. 25.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a lighter bob (d) a longer string
26. 26.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
27. 27.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
28. 28.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a grandfather clock (d) a digital watch
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we measure it (c) we change it
30. 30.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
31. 31.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a stopwatch (c) a pencil and tape (d) a ruler
32. 32.True or false: a string is needed for the pendulum. (a) True (b) False
33. 33.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
34. 34.True or false: a magnet is needed for the pendulum. (a) False (b) True
35. 35.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
36. 36.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
37. 37.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) one swing is too slow (d) 10 is a lucky number
38. 38.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) a balloon (d) a string
39. 39.⚖️ 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
40. 40.🧺 Do we need a string for the pendulum? (a) needed (b) not needed

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