Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 132 · 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.🧺 Which of these is needed for the pendulum? (a) yeast (b) turmeric powder (c) a pencil and tape (d) a battery cell
2. 2.🛟 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
3. 3.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is wet (d) it is magnetic
4. 4.⚖️ 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 keep it the same (c) we change it
5. 5.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) about the same (d) much faster
6. 6.⚖️ 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) how far we pull it back (c) the same hook (d) the string length
7. 7.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) slower (d) stopped
8. 8.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much faster (c) no, hardly at all (d) yes, much slower
9. 9.⚖️ 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
10. 10.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
11. 11.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
12. 12.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it halves (c) it stays the same (d) it doubles
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) False (b) True
14. 14.True or false: a battery cell is needed for the pendulum. (a) False (b) True
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) yeast (c) a stopwatch (d) a string
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) True (b) False
17. 17.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
18. 18.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a magnet (d) a pencil and tape
19. 19.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more accurate (c) one swing is too slow (d) it is more fun
20. 20.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) turmeric powder (c) a heavy nut or washer (d) a stopwatch
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) time for 10 swings (c) the string length
22. 22.True or false: a balloon is not needed for the pendulum. (a) True (b) False
23. 23.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
24. 24.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a magnet (c) a stopwatch (d) a pencil and tape
26. 26.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a string (d) yeast
27. 27.⚖️ 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
28. 28.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
29. 29.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) a ruler (d) a string
30. 30.⚖️ 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) False (b) True
31. 31.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
32. 32.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a ruler (c) a heavy nut or washer (d) yeast
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
34. 34.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
36. 36.⚖️ 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
37. 37.⚖️ 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 weight of the bob (c) the same hook (d) the string length
38. 38.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a digital watch (d) a phone
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
40. 40.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a balloon (d) a ruler

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