Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 843 · 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 of these is not needed for the pendulum? (a) a balloon (b) a stopwatch (c) a heavy nut or washer (d) a ruler
2. 2.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) it is more accurate (d) 10 is a lucky number
3. 3.⚖️ 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
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 weight of the bob (c) the string length (d) how far we pull it back
5. 5.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a small nut or washer (d) a heavy brick
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a magnet (d) a heavy nut or washer
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.True or false: a balloon is needed for the pendulum. (a) False (b) True
9. 9.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) much slower (d) about the same
10. 10.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) yes, much faster (d) it stops swinging
11. 11.⚖️ 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
12. 12.🔮 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 halves (d) it becomes 4 times
13. 13.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
14. 14.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) the wind (c) gravity (d) magnetism
15. 15.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a shorter string (d) a longer string
16. 16.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a pencil and tape (c) a battery cell (d) a mirror
17. 17.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
18. 18.True or false: a string is not needed for the pendulum. (a) False (b) True
19. 19.True or false: a ruler is needed for the pendulum. (a) False (b) True
20. 20.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 39 seconds?
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a balloon (d) a string
22. 22.⚖️ 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
23. 23.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a ruler (d) yeast
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a heavy nut or washer (c) a string (d) a stopwatch
26. 26.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a ruler (c) a battery cell (d) a balloon
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a stopwatch (c) a string (d) a ruler
28. 28.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) slower (d) heavier
29. 29.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
30. 30.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
31. 31.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 24 seconds?
32. 32.⚖️ 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 weight of the bob (c) the string length
33. 33.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
34. 34.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
35. 35.⚖️ 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
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a battery cell (c) a heavy nut or washer (d) a ruler
37. 37.True or false: a ruler is not needed for the pendulum. (a) True (b) False
38. 38.⚖️ 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
39. 39.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a stopwatch (c) yeast (d) a ruler
40. 40.🧺 Which of these is needed for the pendulum? (a) a string (b) a mirror (c) yeast (d) a balloon

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