Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 784 · 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.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) time for 10 swings (c) the string length (d) how far we pull it back
3. 3.⚖️ 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) True (b) False
4. 4.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
5. 5.⚖️ 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 keep it the same (c) we change it
6. 6.⚖️ 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 change it (c) we measure it
7. 7.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
8. 8.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
9. 9.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a phone (d) a sundial
10. 10.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
11. 11.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) it is hot (d) the bob could hit you
12. 12.⚖️ 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 string length
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a magnet (c) a heavy nut or washer (d) a pencil and tape
14. 14.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a sharp tool (d) a heavy brick
15. 15.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
16. 16.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a mirror (c) a battery cell (d) a string
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we change it (c) we measure it
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) True (b) False
19. 19.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
20. 20.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
21. 21.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a pencil and tape (d) a battery cell
22. 22.⚖️ 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
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a heavy nut or washer (c) a pencil and tape (d) a ruler
24. 24.True or false: a magnet is not needed for the pendulum. (a) False (b) True
25. 25.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
26. 26.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
27. 27.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
28. 28.True or false: a string is not needed for the pendulum. (a) True (b) False
29. 29.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) 10 is a lucky number (c) it is more fun (d) one swing is too slow
30. 30.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it doubles (c) it halves (d) it becomes 4 times
31. 31.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a mirror (d) a heavy nut or washer
32. 32.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
33. 33.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
34. 34.⚖️ 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) the string length (c) the weight of the bob
35. 35.⚖️ 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 measure it (c) we change it
36. 36.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
37. 37.True or false: a ruler is needed for the pendulum. (a) True (b) False
38. 38.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a ruler (c) a string (d) a heavy nut or washer
39. 39.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) yes, much slower (d) it stops swinging
40. 40.True or false: a battery cell is needed for the pendulum. (a) True (b) False

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