Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 322 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) yeast (d) a heavy nut or washer
2. 2.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
3. 3.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) it stops swinging (c) yes, much slower (d) yes, much faster
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the string length (c) how far we pull it back (d) the weight of the bob
5. 5.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
6. 6.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
7. 7.⚖️ 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) how far we pull it back (c) time for 10 swings (d) the string length
8. 8.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 42 seconds?
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we keep it the same (c) we measure it
10. 10.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it stays the same (d) it halves
11. 11.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a phone (d) a digital watch
12. 12.🔮 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
13. 13.⚖️ 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
14. 14.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) it is wet (d) the bob could hit you
15. 15.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
16. 16.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
17. 17.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
18. 18.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) stopped (d) heavier
19. 19.True or false: turmeric powder is not 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 accurate (b) one swing is too slow (c) it is more fun (d) 10 is a lucky number
21. 21.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 36 seconds?
22. 22.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) turmeric powder (c) a magnet (d) a ruler
23. 23.🧺 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 stopwatch
24. 24.⚖️ 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
25. 25.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
26. 26.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a stopwatch (d) a magnet
28. 28.True or false: a battery cell is needed for the pendulum. (a) True (b) False
29. 29.⚖️ 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 measure it (b) we change it (c) we keep it the same
30. 30.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
31. 31.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a heavy brick (c) a glass bottle (d) a sharp tool
32. 32.⚖️ 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
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) True (b) False
34. 34.⚖️ 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
35. 35.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
36. 36.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a ruler (c) a heavy nut or washer (d) a pencil and tape
37. 37.⚖️ 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
38. 38.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
39. 39.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a lighter bob (d) a longer string
40. 40.⚖️ 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

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