Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 402 · 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: the weight of the bob is kept the same. (a) False (b) True
2. 2.⚖️ 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
3. 3.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) stopped (d) heavier
4. 4.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a balloon (d) a heavy nut or washer
5. 5.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a sundial (d) a grandfather clock
6. 6.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) magnetism (d) the wind
7. 7.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much slower (c) yes, much faster (d) it stops swinging
8. 8.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) it cannot swing (d) about the same
9. 9.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
10. 10.🧺 Which of these is needed for the pendulum? (a) a string (b) a balloon (c) turmeric powder (d) a battery cell
11. 11.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) it is magnetic (d) the bob could hit you
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) a stopwatch (d) yeast
13. 13.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a glass bottle (d) a heavy brick
14. 14.⚖️ 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 same hook (c) the string length
15. 15.🧺 Which of these is needed for the pendulum? (a) a mirror (b) turmeric powder (c) a stopwatch (d) a battery cell
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a magnet (c) a string (d) a ruler
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a heavy nut or washer (d) a mirror
18. 18.True or false: a string is needed for the pendulum. (a) False (b) True
19. 19.⚖️ 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) the string length (c) how far we pull it back (d) time for 10 swings
20. 20.⚖️ 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) True (b) False
21. 21.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we measure it (c) we keep it the same
23. 23.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) yeast (d) a stopwatch
24. 24.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) it is more accurate (d) 10 is a lucky number
25. 25.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) True (b) False
27. 27.True or false: yeast is needed for the pendulum. (a) True (b) False
28. 28.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) a magnet (d) a string
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we measure it (c) we keep it the same
30. 30.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
31. 31.⚖️ 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
32. 32.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) turmeric powder (d) a stopwatch
33. 33.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the same hook (c) time for 10 swings (d) the weight of the bob
35. 35.True or false: a ruler is needed for the pendulum. (a) False (b) True
36. 36.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
37. 37.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a heavy nut or washer (c) a string (d) a stopwatch
38. 38.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
39. 39.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a heavy nut or washer (d) a mirror
40. 40.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it stays the same (d) it becomes 4 times

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