Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 411 · 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.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) False (b) True
2. 2.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
3. 3.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
4. 4.⚖️ 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) True (b) False
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a magnet (d) a ruler
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we keep it the same (c) we change it
7. 7.⚖️ 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) True (b) False
8. 8.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 36 seconds?
9. 9.⚖️ 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) how far we pull it back (c) the weight of the bob (d) the string length
10. 10.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a heavy brick (d) a small nut or washer
11. 11.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the weight of the bob (c) the string length (d) time for 10 swings
13. 13.🧺 Which of these is not needed for the pendulum? (a) a string (b) a magnet (c) a heavy nut or washer (d) a stopwatch
14. 14.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
15. 15.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
16. 16.True or false: a string is needed for the pendulum. (a) False (b) True
17. 17.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a mirror (d) a string
18. 18.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) magnetism (d) gravity
19. 19.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
20. 20.True or false: a ruler is not needed for the pendulum. (a) False (b) True
21. 21.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) True (b) False
23. 23.True or false: yeast is needed for the pendulum. (a) True (b) False
24. 24.True or false: a ruler is needed for the pendulum. (a) False (b) True
25. 25.⚖️ 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
26. 26.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a string (c) yeast (d) turmeric powder
27. 27.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) a heavy nut or washer (d) a battery cell
28. 28.⚖️ 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 measure it (c) we keep it the same
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) time for 10 swings (c) the string length
30. 30.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a lighter bob (d) a shorter string
31. 31.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
32. 32.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) heavier (d) quicker
33. 33.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a balloon (c) a stopwatch (d) a string
35. 35.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a ruler (c) a pencil and tape (d) a heavy nut or washer
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) the string length (c) time for 10 swings
37. 37.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
38. 38.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
39. 39.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) turmeric powder (c) a heavy nut or washer (d) a ruler

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