Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 540 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a magnet (d) a heavy nut or washer
2. 2.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 27 seconds?
3. 3.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) heavier (d) slower
4. 4.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) the string length (c) the same hook (d) time for 10 swings
6. 6.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) yeast (c) a magnet (d) a battery cell
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
8. 8.True or false: a mirror is not needed for the pendulum. (a) True (b) False
9. 9.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
10. 10.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a stopwatch (c) a mirror (d) a heavy nut or washer
11. 11.🧺 Which of these is needed for the pendulum? (a) a string (b) a magnet (c) a balloon (d) yeast
12. 12.⚖️ 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
13. 13.⚖️ 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
14. 14.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the same hook (c) the string length (d) the weight of the bob
16. 16.🧺 Do we need yeast 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 ruler (b) turmeric powder (c) a stopwatch (d) a heavy nut or washer
18. 18.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
19. 19.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a phone (d) a digital watch
20. 20.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) it is more accurate (d) one swing is too slow
21. 21.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
22. 22.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a heavy brick (d) a glass bottle
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a balloon (d) a stopwatch
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 keep it the same (b) we measure it (c) we change it
25. 25.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
26. 26.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a ruler (c) yeast (d) a magnet
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
28. 28.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
29. 29.⚖️ 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
30. 30.⚖️ 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) True (b) False
31. 31.⚖️ 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
32. 32.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) it cannot swing (c) much faster (d) much slower
33. 33.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) yeast (d) a heavy nut or washer
34. 34.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
35. 35.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
36. 36.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) yes, much faster (d) no, hardly at all
37. 37.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
38. 38.🧺 Which of these is needed for the pendulum? (a) yeast (b) a magnet (c) a mirror (d) a pencil and tape
39. 39.🧺 Which of these is not needed for the pendulum? (a) a string (b) a balloon (c) a stopwatch (d) a ruler
40. 40.True or false: a battery cell is not needed for the pendulum. (a) False (b) True

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