Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 284 · 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? What do we do with “time for 10 swings”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.🔮 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
3. 3.⚖️ 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) True (b) False
4. 4.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) the bob could hit you (d) it is wet
5. 5.⚖️ 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 weight of the bob (c) the string length (d) time for 10 swings
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we measure it (c) we change it
7. 7.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
8. 8.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a battery cell (c) a balloon (d) yeast
9. 9.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) gravity (d) magnetism
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) time for 10 swings (c) how far we pull it back (d) the string length
11. 11.True or false: a battery cell is needed for the pendulum. (a) False (b) True
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a heavy nut or washer (c) a string (d) a ruler
13. 13.🧺 Which of these is needed for the pendulum? (a) a string (b) yeast (c) turmeric powder (d) a mirror
14. 14.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a ruler (c) yeast (d) a mirror
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) turmeric powder (d) a stopwatch
16. 16.🕰️ 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) 10 is a lucky number (d) it is more accurate
17. 17.True or false: yeast is needed for the pendulum. (a) True (b) False
18. 18.True or false: a string is not needed for the pendulum. (a) True (b) False
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) yeast (c) a heavy nut or washer (d) a string
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a stopwatch (c) a string (d) a ruler
21. 21.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) much slower (d) it cannot swing
22. 22.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
23. 23.⚖️ 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 string length (c) the weight of the bob
24. 24.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
25. 25.⚖️ 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 change it (c) we keep it the same
26. 26.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
27. 27.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a heavy brick (c) a sharp tool (d) a glass bottle
28. 28.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a mirror (c) a ruler (d) a heavy nut or washer
29. 29.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a pencil and tape (d) a magnet
30. 30.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
31. 31.🧺 Which of these is needed for the pendulum? (a) yeast (b) a pencil and tape (c) a balloon (d) a battery cell
32. 32.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) turmeric powder (c) a heavy nut or washer (d) a pencil and tape
33. 33.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
34. 34.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
35. 35.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) heavier (d) quicker
36. 36.True or false: a string is needed for the pendulum. (a) True (b) False
37. 37.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
38. 38.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a phone (c) a sundial (d) a digital watch
39. 39.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
40. 40.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed

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