Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 760 · 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? Which of these is the one thing we change? (a) how far we pull it back (b) time for 10 swings (c) the string length (d) the weight of the bob
2. 2.⚖️ 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 keep it the same (b) we measure it (c) we change it
3. 3.⚖️ 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) False (b) True
4. 4.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much slower (d) yes, much faster
5. 5.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
6. 6.⚖️ 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
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the weight of the bob (c) how far we pull it back (d) time for 10 swings
8. 8.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
9. 9.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
10. 10.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we measure it (c) we keep it the same
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a heavy nut or washer (d) yeast
13. 13.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
14. 14.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a battery cell (c) a magnet (d) yeast
15. 15.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a longer string (d) a heavier bob
16. 16.🛟 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
17. 17.⚖️ 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
18. 18.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) about the same (d) it cannot swing
19. 19.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
20. 20.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
21. 21.True or false: yeast is needed for the pendulum. (a) True (b) False
22. 22.⚖️ 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
23. 23.🔮 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
24. 24.True or false: a ruler is not needed for the pendulum. (a) False (b) True
25. 25.⚖️ 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 change it (c) we keep it the same
26. 26.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
27. 27.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) a ruler (d) a battery cell
28. 28.🧺 Which of these is needed for the pendulum? (a) a string (b) yeast (c) a balloon (d) a magnet
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
30. 30.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a heavy nut or washer (c) a stopwatch (d) a ruler
31. 31.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
32. 32.⚖️ 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) False (b) True
33. 33.True or false: a magnet is not needed for the pendulum. (a) True (b) False
34. 34.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a heavy brick (d) a sharp tool
35. 35.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
36. 36.⚖️ 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
37. 37.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a mirror (d) a heavy nut or washer
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a battery cell (d) a pencil and tape
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False

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