Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 616 · 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.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
2. 2.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
3. 3.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
4. 4.⚖️ 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 change it (c) we measure it
5. 5.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) how far we pull it back (c) time for 10 swings
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a mirror (d) a ruler
8. 8.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a small nut or washer (d) a sharp tool
9. 9.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
10. 10.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
11. 11.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a ruler (c) a string (d) a stopwatch
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
13. 13.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
14. 14.⚖️ 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
15. 15.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
16. 16.⚖️ 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 string length (c) the weight of the bob (d) time for 10 swings
17. 17.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) yeast (d) a heavy nut or washer
18. 18.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a stopwatch (c) yeast (d) a balloon
19. 19.⚖️ 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
20. 20.True or false: a mirror is needed for the pendulum. (a) True (b) False
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we measure it (c) we keep it the same
22. 22.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a shorter string (d) a lighter bob
23. 23.🛟 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
24. 24.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a mirror (c) a magnet (d) yeast
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a pencil and tape (c) a heavy nut or washer (d) a stopwatch
26. 26.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) magnetism (d) gravity
27. 27.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
28. 28.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
29. 29.⚖️ 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) False (b) True
30. 30.True or false: a magnet is not needed for the pendulum. (a) True (b) False
31. 31.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
32. 32.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 18 seconds?
33. 33.⚖️ 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 keep it the same (c) we measure it
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) how far we pull it back (c) time for 10 swings (d) the weight of the bob
35. 35.True or false: a string is not needed for the pendulum. (a) False (b) True
36. 36.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) slower (d) quicker
37. 37.🕰️ 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
38. 38.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it halves (c) it doubles (d) it stays the same
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) True (b) False
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a magnet (d) a heavy nut or washer

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