Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 621 · 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 string (b) a heavy nut or washer (c) a ruler (d) a mirror
2. 2.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
3. 3.⚖️ 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
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a stopwatch (c) a string (d) a pencil and tape
5. 5.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) no, hardly at all (d) it stops swinging
6. 6.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) one swing is too slow (c) it is more accurate (d) it is more fun
7. 7.⚖️ 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
8. 8.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
9. 9.⚖️ 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
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) True (b) False
11. 11.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) a balloon (d) a magnet
12. 12.⚖️ 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 change it (b) we measure it (c) we keep it the same
13. 13.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) slower (d) quicker
14. 14.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
15. 15.🧺 Which of these is needed for the pendulum? (a) a string (b) a balloon (c) yeast (d) a magnet
16. 16.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a heavy brick (d) a sharp tool
17. 17.True or false: a battery cell is needed for the pendulum. (a) False (b) True
18. 18.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
19. 19.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) False (b) True
21. 21.⚖️ 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
22. 22.True or false: yeast is needed for the pendulum. (a) False (b) True
23. 23.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) turmeric powder (c) a ruler (d) a mirror
24. 24.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the same hook (c) time for 10 swings
26. 26.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
27. 27.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) time for 10 swings (c) the same hook (d) how far we pull it back
29. 29.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a balloon (c) a magnet (d) turmeric powder
30. 30.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it halves (d) it doubles
31. 31.⚖️ 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
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a string (d) a mirror
33. 33.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) turmeric powder (d) a heavy nut or washer
34. 34.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
35. 35.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
36. 36.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
37. 37.True or false: a magnet is not needed for the pendulum. (a) True (b) False
38. 38.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) a battery cell (d) a pencil and tape
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) how far we pull it back (c) the weight of the bob (d) time for 10 swings
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) True (b) False

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