Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 204 · 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.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
2. 2.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a lighter bob (d) a longer string
3. 3.⚖️ 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) the weight of the bob (d) the string length
4. 4.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it halves (d) it stays the same
5. 5.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) it cannot swing (c) much faster (d) about the same
6. 6.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) yeast (d) a ruler
8. 8.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a pencil and tape (c) a magnet (d) turmeric powder
9. 9.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
10. 10.🛟 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
11. 11.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a magnet (c) a ruler (d) a string
13. 13.⚖️ 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
14. 14.⚖️ 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 string length (c) the same hook (d) time for 10 swings
15. 15.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a battery cell (c) a heavy nut or washer (d) a string
16. 16.🛟 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
17. 17.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) 10 is a lucky number (d) one swing is too slow
18. 18.True or false: a balloon is 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 balloon (b) a pencil and tape (c) a string (d) a heavy nut or washer
20. 20.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 38 seconds?
21. 21.True or false: a balloon is not needed for the pendulum. (a) False (b) True
22. 22.⚖️ 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 change it (c) we keep it the same
23. 23.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a pencil and tape (d) a balloon
24. 24.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) quicker (d) heavier
25. 25.🧺 Which of these is needed for the pendulum? (a) yeast (b) a heavy nut or washer (c) a mirror (d) a magnet
26. 26.⚖️ 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
27. 27.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) a magnet (d) a stopwatch
28. 28.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) yeast (c) a mirror (d) a magnet
29. 29.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a stopwatch (d) turmeric powder
31. 31.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) turmeric powder (c) a magnet (d) a string
32. 32.⚖️ 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
33. 33.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) gravity (d) the wind
34. 34.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
35. 35.True or false: a magnet is needed for the pendulum. (a) False (b) True
36. 36.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a mirror (c) a battery cell (d) a magnet
37. 37.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
38. 38.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
39. 39.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
40. 40.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a mirror (d) a pencil and tape

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