Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 328 · 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.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
2. 2.True or false: yeast is needed for the pendulum. (a) True (b) False
3. 3.True or false: a string is not needed for the pendulum. (a) False (b) True
4. 4.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) it is magnetic (d) the bob could hit you
5. 5.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
6. 6.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) it stops swinging (c) yes, much faster (d) yes, much slower
7. 7.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) stopped (d) quicker
8. 8.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
9. 9.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more accurate (c) it is more fun (d) one swing is too slow
10. 10.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
11. 11.⚖️ 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
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a stopwatch (d) turmeric powder
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we measure it (c) we change it
14. 14.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it doubles (d) it stays the same
15. 15.True or false: a balloon is not needed for the pendulum. (a) False (b) True
16. 16.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
17. 17.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
18. 18.⚖️ 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
19. 19.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a sharp tool (d) a heavy brick
20. 20.⚖️ 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 same hook
21. 21.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) the string length (c) the same hook (d) how far we pull it back
23. 23.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a lighter bob (d) a shorter string
24. 24.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) magnetism (d) the wind
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a battery cell (d) a stopwatch
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a pencil and tape (c) a stopwatch (d) a ruler
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False
28. 28.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
29. 29.⚖️ 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) True (b) False
30. 30.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a stopwatch (c) a ruler (d) a balloon
31. 31.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
32. 32.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) it cannot swing (d) much faster
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a string (d) yeast
34. 34.True or false: a balloon is needed for the pendulum. (a) False (b) True
35. 35.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a ruler (c) yeast (d) a balloon
36. 36.🧺 Which of these is needed for the pendulum? (a) a string (b) a mirror (c) yeast (d) turmeric powder
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a magnet (d) a pencil and tape
38. 38.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
39. 39.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a pencil and tape (c) a magnet (d) a balloon
40. 40.⚖️ 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) True (b) False

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