Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 853 · 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.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) the bob could hit you (d) it is hot
2. 2.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
3. 3.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 12 seconds?
4. 4.⚖️ 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
5. 5.🧺 Which of these is needed for the pendulum? (a) a string (b) a battery cell (c) a mirror (d) a balloon
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) time for 10 swings (c) the weight of the bob
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.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a digital watch (d) a sundial
9. 9.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it becomes 4 times (c) it stays the same (d) it halves
10. 10.True or false: a ruler is needed for the pendulum. (a) True (b) False
11. 11.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
12. 12.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a mirror (c) turmeric powder (d) a balloon
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) yeast (d) a heavy nut or washer
14. 14.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
15. 15.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a heavy brick (d) a small nut or washer
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
17. 17.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) a pencil and tape (d) a mirror
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a balloon (d) a heavy nut or washer
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
20. 20.True or false: a string is not needed for the pendulum. (a) True (b) False
21. 21.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
22. 22.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much faster (d) yes, much slower
23. 23.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) it cannot swing (d) much slower
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a heavy nut or washer (d) a battery cell
25. 25.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
26. 26.🧺 Which of these is not needed for the pendulum? (a) a string (b) a magnet (c) a pencil and tape (d) a stopwatch
27. 27.⚖️ 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
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 weight of the bob (b) the string length (c) how far we pull it back (d) the same hook
29. 29.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) yeast (c) turmeric powder (d) a heavy nut or washer
30. 30.⚖️ 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
31. 31.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more accurate (c) it is more fun (d) one swing is too slow
32. 32.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
33. 33.True or false: a balloon is not needed for the pendulum. (a) True (b) False
34. 34.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
35. 35.⚖️ 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
36. 36.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a shorter string (d) a lighter bob
37. 37.⚖️ 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
38. 38.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
39. 39.⚖️ 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) True (b) False
40. 40.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a mirror (c) a magnet (d) a battery cell

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