Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 285 · 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: how far we pull it back is kept the same. (a) False (b) True
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) True (b) False
3. 3.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
4. 4.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
5. 5.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a small nut or washer (d) a glass bottle
6. 6.⚖️ 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 keep it the same (b) we measure it (c) we change it
7. 7.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the string length (c) the weight of the bob (d) how far we pull it back
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we keep it the same (c) we change it
10. 10.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a phone (d) a grandfather clock
11. 11.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
12. 12.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
14. 14.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
15. 15.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a shorter string (d) a longer string
16. 16.⚖️ 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
17. 17.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) yeast (c) a stopwatch (d) a balloon
18. 18.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 26 seconds?
19. 19.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
20. 20.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is magnetic (d) it is wet
21. 21.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a magnet (c) a mirror (d) yeast
22. 22.True or false: a string is not needed for the pendulum. (a) False (b) True
23. 23.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
24. 24.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a string (d) turmeric powder
25. 25.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it doubles (d) it halves
26. 26.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a mirror (c) a stopwatch (d) a pencil and tape
28. 28.⚖️ 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) False (b) True
29. 29.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) it stops swinging (d) no, hardly at all
30. 30.⚖️ 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
31. 31.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a ruler (d) a balloon
32. 32.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) one swing is too slow (d) 10 is a lucky number
33. 33.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a ruler (d) a magnet
35. 35.⚖️ 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
36. 36.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a string (d) a balloon
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a string (d) a battery cell
39. 39.True or false: yeast is needed for the pendulum. (a) False (b) True
40. 40.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) gravity (d) magnetism

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