Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 250 · 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 mirror is needed for the pendulum. (a) False (b) True
2. 2.⚖️ 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) how far we pull it back (d) the same hook
3. 3.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) it is more accurate (d) 10 is a lucky number
4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
5. 5.⚖️ 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
6. 6.True or false: a ruler is not needed for the pendulum. (a) False (b) True
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a magnet (d) a heavy nut or washer
8. 8.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
9. 9.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) yeast (c) a balloon (d) a stopwatch
10. 10.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
11. 11.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
12. 12.True or false: yeast is not needed for the pendulum. (a) True (b) False
13. 13.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 54 seconds?
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a ruler (d) a balloon
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the weight of the bob (c) time for 10 swings (d) the same hook
16. 16.⚖️ 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
17. 17.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
18. 18.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a balloon (c) a heavy nut or washer (d) turmeric powder
19. 19.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a sundial (d) a phone
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a mirror (c) a pencil and tape (d) a stopwatch
21. 21.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a mirror (c) a stopwatch (d) a string
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we change it (c) we keep it the same
23. 23.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a heavier bob (d) a shorter string
24. 24.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
25. 25.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) time for 10 swings (c) the string length
27. 27.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) gravity (d) the string
28. 28.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
29. 29.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
30. 30.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
31. 31.True or false: a balloon is needed for the pendulum. (a) True (b) False
32. 32.🔮 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 stays the same (d) it halves
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) yeast (d) a string
34. 34.True or false: a string is needed for the pendulum. (a) True (b) False
35. 35.⚖️ 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 change it (b) we measure it (c) we keep it the same
36. 36.🔮 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
37. 37.🕰️ 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
38. 38.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
39. 39.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
40. 40.🛟 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

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