Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 613 · 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? What do we do with “the string length”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?
3. 3.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) stopped (d) quicker
4. 4.🧺 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) turmeric powder (d) a string
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we keep it the same (c) we change it
6. 6.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) the bob could hit you (d) it is magnetic
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
8. 8.🧺 Which of these is needed for the pendulum? (a) a ruler (b) turmeric powder (c) a battery cell (d) a magnet
9. 9.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a stopwatch (c) a pencil and tape (d) a heavy nut or washer
11. 11.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
12. 12.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
13. 13.🔮 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 doubles (d) it stays the same
14. 14.⚖️ 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
15. 15.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
16. 16.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a pencil and tape (d) a magnet
18. 18.⚖️ 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) how far we pull it back (c) the weight of the bob (d) the string length
19. 19.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a battery cell (c) a balloon (d) a pencil and tape
20. 20.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) a magnet (d) a heavy nut or washer
21. 21.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) yeast (c) a string (d) a battery cell
22. 22.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
23. 23.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) no, hardly at all (d) yes, much faster
24. 24.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a mirror (d) a ruler
26. 26.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a balloon (d) a stopwatch
27. 27.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a balloon (c) a magnet (d) a heavy nut or washer
28. 28.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
29. 29.⚖️ 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
30. 30.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
31. 31.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) it cannot swing (d) about the same
32. 32.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a pencil and tape (d) a battery cell
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the same hook (c) the string length (d) the weight of the bob
35. 35.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more accurate (c) it is more fun (d) one swing is too slow
36. 36.⚖️ 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) the string length (c) time for 10 swings
37. 37.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a lighter bob (d) a longer string
38. 38.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 27 seconds?
39. 39.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
40. 40.🛟 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

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