Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 995 · 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) it is wet (b) it is hot (c) the bob could hit you (d) it is magnetic
2. 2.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) it cannot swing (d) about the same
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a battery cell (c) a heavy nut or washer (d) a string
4. 4.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
5. 5.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 15 seconds?
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
7. 7.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) one swing is too slow (d) 10 is a lucky number
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) time for 10 swings (c) the string length
9. 9.True or false: yeast is not 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.🧺 Which of these is needed for the pendulum? (a) yeast (b) turmeric powder (c) a ruler (d) a magnet
12. 12.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) the wind (d) magnetism
13. 13.True or false: a mirror is not needed for the pendulum. (a) False (b) True
14. 14.⚖️ 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
15. 15.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) yes, much faster (d) no, hardly at all
16. 16.True or false: a ruler 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.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a heavy brick (d) a small nut or washer
19. 19.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a longer string (d) a lighter bob
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) the string length (c) the weight of the bob (d) time for 10 swings
21. 21.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a heavy nut or washer (c) a mirror (d) turmeric powder
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a pencil and tape (c) a heavy nut or washer (d) a stopwatch
23. 23.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
24. 24.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we measure it (c) we change it
26. 26.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
27. 27.⚖️ 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
28. 28.True or false: a string is not needed for the pendulum. (a) True (b) False
29. 29.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
30. 30.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
31. 31.⚖️ 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
32. 32.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a string (d) turmeric powder
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
34. 34.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
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.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it halves (d) it doubles
37. 37.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?
38. 38.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) heavier (d) quicker
39. 39.⚖️ 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 string length (c) how far we pull it back (d) time for 10 swings
40. 40.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?

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