Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 175 · 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.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
2. 2.⚖️ 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
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) the string length (c) the weight of the bob (d) how far we pull it back
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a balloon (c) a pencil and tape (d) a string
5. 5.True or false: a balloon is needed for the pendulum. (a) True (b) False
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a ruler (c) a pencil and tape (d) a string
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) turmeric powder (c) a string (d) a ruler
8. 8.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a sharp tool (d) a glass bottle
9. 9.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
10. 10.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) yeast (c) a pencil and tape (d) a magnet
11. 11.⚖️ 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
12. 12.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) the bob could hit you (d) it is hot
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) how far we pull it back (c) time for 10 swings
14. 14.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
15. 15.⚖️ 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
16. 16.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it doubles (d) it halves
17. 17.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
18. 18.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
19. 19.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a sundial (d) a phone
20. 20.⚖️ 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) how far we pull it back (c) the weight of the bob (d) the string length
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) the string length (c) time for 10 swings
22. 22.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 30 seconds?
23. 23.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
24. 24.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a magnet (c) a heavy nut or washer (d) a mirror
25. 25.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
26. 26.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
27. 27.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a mirror (c) a string (d) a heavy nut or washer
28. 28.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
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.⚖️ 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
31. 31.⚖️ 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
32. 32.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a pencil and tape (c) a stopwatch (d) a ruler
33. 33.True or false: a ruler is not needed for the pendulum. (a) False (b) True
34. 34.⚖️ 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 change it (c) we measure it
35. 35.True or false: a string is needed for the pendulum. (a) False (b) True
36. 36.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a ruler (c) a balloon (d) turmeric powder
37. 37.⚖️ 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
38. 38.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
39. 39.True or false: a mirror is needed for the pendulum. (a) True (b) False
40. 40.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) a ruler (d) a pencil and tape

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