Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 145 · 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.🛟 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
2. 2.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a lighter bob (d) a shorter string
3. 3.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a mirror (c) a magnet (d) turmeric powder
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) the same hook (c) time for 10 swings (d) the string length
5. 5.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a digital watch (d) a phone
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we keep it the same (c) we measure it
7. 7.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
8. 8.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) it is more accurate (d) one swing is too slow
9. 9.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
10. 10.⚖️ 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
11. 11.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
12. 12.True or false: a ruler is needed for the pendulum. (a) False (b) True
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a battery cell (d) a string
14. 14.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
15. 15.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
16. 16.⚖️ 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) False (b) True
17. 17.⚖️ 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) True (b) False
18. 18.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) turmeric powder (c) a ruler (d) a pencil and tape
19. 19.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
20. 20.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
21. 21.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) about the same (d) it cannot swing
22. 22.⚖️ 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
23. 23.⚖️ 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 keep it the same (b) we change it (c) we measure it
24. 24.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) a balloon (d) yeast
25. 25.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
26. 26.True or false: yeast is needed for the pendulum. (a) False (b) True
27. 27.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) the wind (c) magnetism (d) gravity
28. 28.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
29. 29.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a string (c) a balloon (d) a mirror
30. 30.⚖️ 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
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a stopwatch (d) a mirror
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
33. 33.⚖️ 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) how far we pull it back
34. 34.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
35. 35.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it becomes 4 times (d) it stays the same
36. 36.⚖️ 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) True (b) False
37. 37.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) no, hardly at all (d) it stops swinging
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a balloon (c) a ruler (d) a stopwatch
39. 39.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a balloon (d) a stopwatch
40. 40.⚖️ 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

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