Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 261 · 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 15 swings in 15 seconds. How many seconds does one swing take?
2. 2.True or false: a string is not needed for the pendulum. (a) True (b) False
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) turmeric powder (c) a ruler (d) a pencil and tape
4. 4.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
5. 5.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) a mirror (d) a ruler
6. 6.⚖️ 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
7. 7.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
8. 8.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
9. 9.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a small nut or washer (d) a heavy brick
10. 10.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is hot (d) it is magnetic
11. 11.True or false: yeast is needed for the pendulum. (a) True (b) False
12. 12.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a sundial (d) a digital watch
13. 13.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) quicker (d) stopped
14. 14.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) a mirror (d) a string
15. 15.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
16. 16.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) it stops swinging (d) yes, much faster
17. 17.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a heavy nut or washer (d) turmeric powder
18. 18.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it stays the same (d) it doubles
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) time for 10 swings (c) how far we pull it back (d) the weight of the bob
20. 20.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 18 seconds?
21. 21.⚖️ 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 change it (b) we measure it (c) we keep it the same
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a magnet (c) a heavy nut or washer (d) a ruler
23. 23.⚖️ 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
24. 24.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
25. 25.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
26. 26.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) much faster (d) it cannot swing
27. 27.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
28. 28.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a lighter bob (d) a heavier bob
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the weight of the bob (c) the string length
30. 30.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a balloon (c) a mirror (d) a ruler
31. 31.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) yeast (d) a stopwatch
32. 32.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
33. 33.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
34. 34.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
35. 35.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a pencil and tape (d) turmeric powder
36. 36.⚖️ 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
37. 37.True or false: a battery cell is needed for the pendulum. (a) True (b) False
38. 38.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
39. 39.⚖️ 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
40. 40.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a stopwatch (c) a mirror (d) yeast

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