Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 510 · 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 not needed for the pendulum? (a) a ruler (b) a magnet (c) a string (d) a heavy nut or washer
2. 2.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a heavy nut or washer (c) a string (d) a stopwatch
4. 4.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it becomes 4 times (c) it halves (d) it stays the same
5. 5.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
6. 6.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
7. 7.⚖️ 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
8. 8.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) 10 is a lucky number (c) it is more fun (d) it is more accurate
9. 9.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) the bob could hit you (d) it is hot
10. 10.⚖️ 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 keep it the same (c) we measure it
11. 11.True or false: a string is not needed for the pendulum. (a) True (b) False
12. 12.⚖️ 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
13. 13.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) a battery cell (d) a stopwatch
14. 14.⚖️ 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) how far we pull it back (c) the string length (d) the weight of the bob
15. 15.⚖️ 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
16. 16.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
17. 17.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a heavy brick (d) a small nut or washer
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the same hook (c) the weight of the bob (d) the string length
19. 19.⚖️ 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) False (b) True
20. 20.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
21. 21.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a pencil and tape (d) a battery cell
22. 22.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
23. 23.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 13 seconds?
24. 24.⚖️ 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
25. 25.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a longer string (d) a heavier bob
26. 26.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
27. 27.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
28. 28.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
29. 29.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) yeast (c) a string (d) a mirror
30. 30.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) turmeric powder (c) a string (d) a ruler
31. 31.🧺 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 mirror (d) a ruler
32. 32.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
33. 33.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
34. 34.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a heavy nut or washer (c) a magnet (d) a balloon
35. 35.True or false: a mirror is needed for the pendulum. (a) True (b) False
36. 36.⚖️ 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) True (b) False
37. 37.⚖️ 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 keep it the same (c) we measure it
38. 38.🧺 Do we need a balloon 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: the weight of the bob is kept the same. (a) False (b) True
40. 40.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) the string (d) magnetism

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