Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 87 · 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.⚖️ 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) how far we pull it back (d) time for 10 swings
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) time for 10 swings (c) the string length
3. 3.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it doubles (c) it becomes 4 times (d) it halves
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) how far we pull it back (c) the same hook (d) the string length
5. 5.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the weight of the bob (c) time for 10 swings
7. 7.True or false: yeast is needed for the pendulum. (a) True (b) False
8. 8.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much slower (c) much faster (d) it cannot swing
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a heavy nut or washer (c) a stopwatch (d) a pencil and tape
10. 10.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is magnetic (d) it is wet
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a string (d) yeast
12. 12.⚖️ 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) False (b) True
13. 13.🕰️ 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
14. 14.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
15. 15.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) slower (d) stopped
16. 16.⚖️ 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
17. 17.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
18. 18.🧺 Which of these is not needed for the pendulum? (a) a string (b) a mirror (c) a pencil and tape (d) a stopwatch
19. 19.⚖️ 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
20. 20.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
21. 21.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a heavy brick (d) a glass bottle
22. 22.⚖️ 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
23. 23.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
24. 24.⚖️ 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
25. 25.True or false: a mirror is needed for the pendulum. (a) True (b) False
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a heavy nut or washer (c) a ruler (d) a stopwatch
27. 27.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
28. 28.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 18 seconds?
29. 29.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) it is more accurate (c) one swing is too slow (d) 10 is a lucky number
30. 30.True or false: yeast is not needed for the pendulum. (a) True (b) False
31. 31.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a string (d) a balloon
32. 32.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
33. 33.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
34. 34.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a digital watch (d) a grandfather clock
35. 35.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
36. 36.True or false: a balloon is not needed for the pendulum. (a) False (b) True
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) True (b) False
38. 38.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
39. 39.⚖️ 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
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a ruler (c) a stopwatch (d) a pencil and tape

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