Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 711 · 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.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a shorter string (c) a heavier bob (d) a lighter bob
2. 2.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) the bob could hit you (d) it is wet
3. 3.True or false: a ruler is needed for the pendulum. (a) False (b) True
4. 4.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a battery cell (c) a string (d) a stopwatch
6. 6.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it stays the same (d) it doubles
7. 7.⚖️ 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
8. 8.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) yeast (c) a ruler (d) a string
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
11. 11.⚖️ 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
12. 12.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the same hook
14. 14.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much faster (c) it cannot swing (d) much slower
15. 15.True or false: a string is not needed for the pendulum. (a) True (b) False
16. 16.True or false: a magnet is not needed for the pendulum. (a) False (b) True
17. 17.True or false: a battery cell is needed for the pendulum. (a) False (b) True
18. 18.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) the string (d) magnetism
19. 19.🧺 Which of these is needed for the pendulum? (a) a mirror (b) yeast (c) a battery cell (d) a heavy nut or washer
20. 20.⚖️ 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
21. 21.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a balloon (c) a string (d) a ruler
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) False (b) True
23. 23.🕰️ A pendulum makes 20 swings in 60 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 measure it (b) we change it (c) we keep it the same
25. 25.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
26. 26.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a small nut or washer (d) a sharp tool
27. 27.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more accurate (c) 10 is a lucky number (d) it is more fun
28. 28.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a balloon (c) a ruler (d) a pencil and tape
30. 30.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much faster (c) yes, much slower (d) no, hardly at all
31. 31.⚖️ 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) False (b) True
32. 32.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
33. 33.🧺 Which of these is needed for the pendulum? (a) a mirror (b) turmeric powder (c) a battery cell (d) a string
34. 34.⚖️ 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 same hook (c) how far we pull it back (d) the string length
35. 35.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a mirror (c) a balloon (d) a stopwatch
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) time for 10 swings (c) the same hook (d) the string length
37. 37.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a heavy nut or washer (d) a mirror
39. 39.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
40. 40.🧺 Do we need a string for the pendulum? (a) not needed (b) needed

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