Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 992 · 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.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the string (d) the wind
2. 2.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a longer string (d) a shorter string
3. 3.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) turmeric powder (d) a stopwatch
4. 4.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is hot (d) it is wet
5. 5.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) yes, much slower (d) no, hardly at all
6. 6.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
7. 7.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the weight of the bob (c) time for 10 swings (d) the string length
9. 9.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
11. 11.⚖️ 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
12. 12.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 14 seconds?
13. 13.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
14. 14.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) a battery cell (d) yeast
15. 15.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
16. 16.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 16 seconds?
17. 17.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) it cannot swing (d) about the same
18. 18.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
19. 19.True or false: a battery cell is needed for the pendulum. (a) False (b) True
20. 20.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) it is more accurate (c) 10 is a lucky number (d) one swing is too slow
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (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 keep it the same (b) we measure it (c) we change it
23. 23.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
24. 24.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
25. 25.⚖️ 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) False (b) True
26. 26.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we measure it (c) we change it
28. 28.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
29. 29.True or false: yeast is not needed for the pendulum. (a) True (b) False
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) how far we pull it back
31. 31.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) stopped (c) slower (d) heavier
32. 32.⚖️ 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
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a heavy nut or washer (d) yeast
34. 34.True or false: yeast is needed for the pendulum. (a) True (b) False
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a mirror (d) a ruler
36. 36.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it doubles (d) it becomes 4 times
37. 37.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
38. 38.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) False (b) True
40. 40.🛟 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

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