Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 861 · 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.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it becomes 4 times (d) it stays the same
2. 2.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
3. 3.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
4. 4.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
5. 5.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) 10 is a lucky number (c) it is more fun (d) it is more accurate
6. 6.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) heavier (d) slower
7. 7.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) yeast (d) a string
8. 8.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
9. 9.⚖️ 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) how far we pull it back (c) the string length
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a balloon (c) a stopwatch (d) a string
11. 11.⚖️ 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) False (b) True
12. 12.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
13. 13.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a magnet (d) a heavy nut or washer
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a magnet (d) a ruler
15. 15.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) turmeric powder (c) a ruler (d) a heavy nut or washer
17. 17.🛟 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
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) yeast (c) a stopwatch (d) a pencil and tape
20. 20.🧺 Which of these is needed for the pendulum? (a) yeast (b) a stopwatch (c) a balloon (d) a battery cell
21. 21.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a ruler (d) a battery cell
23. 23.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a heavy nut or washer (c) a mirror (d) a battery cell
24. 24.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much slower (c) it stops swinging (d) yes, much faster
25. 25.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
26. 26.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a sharp tool (d) a small nut or washer
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) False (b) True
28. 28.⚖️ 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
29. 29.⚖️ 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
30. 30.True or false: a string is not needed for the pendulum. (a) True (b) False
31. 31.True or false: a magnet is needed for the pendulum. (a) False (b) True
32. 32.⚖️ 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
33. 33.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a ruler (c) a stopwatch (d) a heavy nut or washer
34. 34.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) much slower (d) it cannot swing
35. 35.⚖️ 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
36. 36.⚖️ 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
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) the string length (c) time for 10 swings
38. 38.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
39. 39.⚖️ 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 measure it (c) we keep it the same
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) True (b) False

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